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31043442 = 235173907
BaseRepresentation
bin111011001101…
…0111101110010
32011102011121010
41312122331302
530421342232
63025211350
7524602443
oct166327562
964364533
1031043442
1116583441
12a490b56
13657bc01
1441a12ca
152ad30cc
hex1d9af72

31043442 has 8 divisors (see below), whose sum is σ = 62086896. Its totient is φ = 10347812.

The previous prime is 31043417. The next prime is 31043443. The reversal of 31043442 is 24434013.

It is a sphenic number, since it is the product of 3 distinct primes.

31043442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31043443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2586948 + ... + 2586959.

It is an arithmetic number, because the mean of its divisors is an integer number (7760862).

Almost surely, 231043442 is an apocalyptic number.

31043442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31043442 is a wasteful number, since it uses less digits than its factorization.

31043442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173912.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31043442 is about 5571.6642038084. The cubic root of 31043442 is about 314.2847363803.

Adding to 31043442 its reverse (24434013), we get a palindrome (55477455).

The spelling of 31043442 in words is "thirty-one million, forty-three thousand, four hundred forty-two".

Divisors: 1 2 3 6 5173907 10347814 15521721 31043442