31242092 has 12 divisors (see below), whose sum is σ = 62484240. Its totient is φ = 13389456.

The previous prime is 31242091. The next prime is 31242103. The reversal of 31242092 is 29024213.

31242092 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31242091) 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, 557867 + ... + 557922.

It is an arithmetic number, because the mean of its divisors is an integer number (5207020).

Almost surely, 2^31242092 is an apocalyptic number.

It is an amenable number.

31242092 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.

31242092 is a wasteful number, since it uses less digits than its factorization.

31242092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115800 (or 1115798 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 31242092 is about 5589.4625859737. The cubic root of 31242092 is about 314.9536910171.

The spelling of 31242092 in words is "thirty-one million, two hundred forty-two thousand, ninety-two".