31057242 has 16 divisors (see below), whose sum is σ = 62169120. Its totient is φ = 10343312.

The previous prime is 31057241. The next prime is 31057253. The reversal of 31057242 is 24275013.

It is a super-4 number, since 4×31057242⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (31057241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12109 + ... + 14447.

It is an arithmetic number, because the mean of its divisors is an integer number (3885570).

Almost surely, 2^31057242 is an apocalyptic number.

31057242 is an abundant number, since it is smaller than the sum of its proper divisors (31111878).

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

31057242 is a wasteful number, since it uses less digits than its factorization.

31057242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 31057242 is about 5572.9024753713. The cubic root of 31057242 is about 314.3313000189.

The spelling of 31057242 in words is "thirty-one million, fifty-seven thousand, two hundred forty-two".