31042457 has 2 divisors, whose sum is σ = 31042458. Its totient is φ = 31042456.

The previous prime is 31042421. The next prime is 31042463. The reversal of 31042457 is 75424013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30261001 + 781456 = 5501^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 31042457 - 2⁶ = 31042393 is a prime.

It is not a weakly prime, because it can be changed into another prime (31042057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521228 + 15521229.

It is an arithmetic number, because the mean of its divisors is an integer number (15521229).

Almost surely, 2^31042457 is an apocalyptic number.

It is an amenable number.

31042457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31042457 is an equidigital number, since it uses as much as digits as its factorization.

31042457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 31042457 is about 5571.5758094098. The cubic root of 31042457 is about 314.2814122886.

The spelling of 31042457 in words is "thirty-one million, forty-two thousand, four hundred fifty-seven".