31235453257 has 2 divisors, whose sum is σ = 31235453258. Its totient is φ = 31235453256.

The previous prime is 31235453191. The next prime is 31235453273. The reversal of 31235453257 is 75235453213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31200276496 + 35176761 = 176636^2 + 5931^2 .

It is a cyclic number.

It is not a de Polignac number, because 31235453257 - 2³¹ = 29087969609 is a prime.

It is not a weakly prime, because it can be changed into another prime (31235453957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15617726628 + 15617726629.

It is an arithmetic number, because the mean of its divisors is an integer number (15617726629).

Almost surely, 2^31235453257 is an apocalyptic number.

It is an amenable number.

31235453257 is a deficient number, since it is larger than the sum of its proper divisors (1).

31235453257 is an equidigital number, since it uses as much as digits as its factorization.

31235453257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 40.

The spelling of 31235453257 in words is "thirty-one billion, two hundred thirty-five million, four hundred fifty-three thousand, two hundred fifty-seven".