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31401100 = 22521931627
BaseRepresentation
bin111011111001…
…0010010001100
32012002100012201
41313302102030
531014313400
63041011244
7530622253
oct167622214
965070181
1031401100
11167a8125
12a623b24
136675943
14425579a
152b5406a
hex1df248c

31401100 has 36 divisors (see below), whose sum is σ = 68535544. Its totient is φ = 12487680.

The previous prime is 31401079. The next prime is 31401101. The reversal of 31401100 is 110413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (31401101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18487 + ... + 20113.

Almost surely, 231401100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31401100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34267772).

31401100 is an abundant number, since it is smaller than the sum of its proper divisors (37134444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31401100 is a wasteful number, since it uses less digits than its factorization.

31401100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 31401100 is about 5603.6684412981. The cubic root of 31401100 is about 315.4871106337.

Adding to 31401100 its reverse (110413), we get a palindrome (31511513).

The spelling of 31401100 in words is "thirty-one million, four hundred one thousand, one hundred".

Divisors: 1 2 4 5 10 20 25 50 100 193 386 772 965 1627 1930 3254 3860 4825 6508 8135 9650 16270 19300 32540 40675 81350 162700 314011 628022 1256044 1570055 3140110 6280220 7850275 15700550 31401100