331130312281 has 2 divisors, whose sum is σ = 331130312282. Its totient is φ = 331130312280.

The previous prime is 331130312221. The next prime is 331130312329. The reversal of 331130312281 is 182213031133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319897704025 + 11232608256 = 565595^2 + 105984^2 .

It is a cyclic number.

It is not a de Polignac number, because 331130312281 - 2⁹ = 331130311769 is a prime.

It is a super-2 number, since 2×331130312281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331130312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165565156140 + 165565156141.

It is an arithmetic number, because the mean of its divisors is an integer number (165565156141).

Almost surely, 2^331130312281 is an apocalyptic number.

It is an amenable number.

331130312281 is a deficient number, since it is larger than the sum of its proper divisors (1).

331130312281 is an equidigital number, since it uses as much as digits as its factorization.

331130312281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 331130312281 in words is "three hundred thirty-one billion, one hundred thirty million, three hundred twelve thousand, two hundred eighty-one".