31157183401 has 2 divisors, whose sum is σ = 31157183402. Its totient is φ = 31157183400.

The previous prime is 31157183287. The next prime is 31157183411. The reversal of 31157183401 is 10438175113.

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., 26012851225 + 5144332176 = 161285^2 + 71724^2 .

It is a cyclic number.

It is not a de Polignac number, because 31157183401 - 2⁷ = 31157183273 is a prime.

It is not a weakly prime, because it can be changed into another prime (31157183411) 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, 15578591700 + 15578591701.

It is an arithmetic number, because the mean of its divisors is an integer number (15578591701).

Almost surely, 2^31157183401 is an apocalyptic number.

It is an amenable number.

31157183401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31157183401 is an equidigital number, since it uses as much as digits as its factorization.

31157183401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 31157183401 in words is "thirty-one billion, one hundred fifty-seven million, one hundred eighty-three thousand, four hundred one".