31140957 has 16 divisors (see below), whose sum is σ = 45384192. Its totient is φ = 18908160.

The previous prime is 31140929. The next prime is 31140979. The reversal of 31140957 is 75904113.

It is not a de Polignac number, because 31140957 - 2²³ = 22752349 is a prime.

It is a super-3 number, since 3×31140957³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8268 + ... + 11429.

It is an arithmetic number, because the mean of its divisors is an integer number (2836512).

Almost surely, 2^31140957 is an apocalyptic number.

It is an amenable number.

31140957 is a deficient number, since it is larger than the sum of its proper divisors (14243235).

31140957 is a wasteful number, since it uses less digits than its factorization.

31140957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19748.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 31140957 is about 5580.4083183939. The cubic root of 31140957 is about 314.6134739986.

The spelling of 31140957 in words is "thirty-one million, one hundred forty thousand, nine hundred fifty-seven".