331358561081 has 2 divisors, whose sum is σ = 331358561082. Its totient is φ = 331358561080.

The previous prime is 331358560999. The next prime is 331358561129. The reversal of 331358561081 is 180165853133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283360323856 + 47998237225 = 532316^2 + 219085^2 .

It is a cyclic number.

It is not a de Polignac number, because 331358561081 - 2³⁰ = 330284819257 is a prime.

It is a super-2 number, since 2×331358561081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331358569081) 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, 165679280540 + 165679280541.

It is an arithmetic number, because the mean of its divisors is an integer number (165679280541).

Almost surely, 2^331358561081 is an apocalyptic number.

It is an amenable number.

331358561081 is a deficient number, since it is larger than the sum of its proper divisors (1).

331358561081 is an equidigital number, since it uses as much as digits as its factorization.

331358561081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 331358561081 in words is "three hundred thirty-one billion, three hundred fifty-eight million, five hundred sixty-one thousand, eighty-one".