31056642 has 16 divisors (see below), whose sum is σ = 69014880. Its totient is φ = 10352196.

The previous prime is 31056617. The next prime is 31056661. The reversal of 31056642 is 24665013.

31056642 is a `hidden beast` number, since 3 + 10 + 5 + 6 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287508 + ... + 287615.

It is an arithmetic number, because the mean of its divisors is an integer number (4313430).

Almost surely, 2^31056642 is an apocalyptic number.

31056642 is an abundant number, since it is smaller than the sum of its proper divisors (37958238).

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

31056642 is a wasteful number, since it uses less digits than its factorization.

31056642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575134 (or 575128 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 31056642 is about 5572.8486431986. The cubic root of 31056642 is about 314.3292757997.

The spelling of 31056642 in words is "thirty-one million, fifty-six thousand, six hundred forty-two".