331811712961 has 3 divisors (see below), whose sum is σ = 331812288993. Its totient is φ = 331811136930.

The previous prime is 331811712959. The next prime is 331811712971. The reversal of 331811712961 is 169217118133.

The square root of 331811712961 is 576031.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 331811712961 - 2¹ = 331811712959 is a prime.

It is a super-2 number, since 2×331811712961² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331811712971) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 288016 + ... + 864046.

It is an arithmetic number, because the mean of its divisors is an integer number (110604096331).

Almost surely, 2^331811712961 is an apocalyptic number.

331811712961 is the 576031-st square number.

331811712961 is the 288016-th centered octagonal number.

It is an amenable number.

331811712961 is a deficient number, since it is larger than the sum of its proper divisors (576032).

331811712961 is an frugal number, since it uses more digits than its factorization.

331811712961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152062 (or 576031 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The spelling of 331811712961 in words is "three hundred thirty-one billion, eight hundred eleven million, seven hundred twelve thousand, nine hundred sixty-one".