31400200 has 72 divisors (see below), whose sum is σ = 79138350. Its totient is φ = 11581440.

The previous prime is 31400189. The next prime is 31400231. The reversal of 31400200 is 200413.

It can be written as a sum of positive squares in 9 ways, for example, as 6260004 + 25140196 = 2502^2 + 5014^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33336 + ... + 34264.

Almost surely, 2^31400200 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 31400200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39569175).

31400200 is an abundant number, since it is smaller than the sum of its proper divisors (47738150).

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

31400200 is a wasteful number, since it uses less digits than its factorization.

31400200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 31400200 is about 5603.5881361856. The cubic root of 31400200 is about 315.4840965024.

Adding to 31400200 its reverse (200413), we get a palindrome (31600613).

The spelling of 31400200 in words is "thirty-one million, four hundred thousand, two hundred".