331770487313 has 2 divisors, whose sum is σ = 331770487314. Its totient is φ = 331770487312.

The previous prime is 331770487309. The next prime is 331770487339. The reversal of 331770487313 is 313784077133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331646988544 + 123498769 = 575888^2 + 11113^2 .

It is a cyclic number.

It is not a de Polignac number, because 331770487313 - 2² = 331770487309 is a prime.

It is a super-2 number, since 2×331770487313² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331770487393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165885243656 + 165885243657.

It is an arithmetic number, because the mean of its divisors is an integer number (165885243657).

Almost surely, 2^331770487313 is an apocalyptic number.

It is an amenable number.

331770487313 is a deficient number, since it is larger than the sum of its proper divisors (1).

331770487313 is an equidigital number, since it uses as much as digits as its factorization.

331770487313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 331770487313 in words is "three hundred thirty-one billion, seven hundred seventy million, four hundred eighty-seven thousand, three hundred thirteen".