331530936256081 has 9 divisors (see below), whose sum is σ = 337905245059291. Its totient is φ = 325274688756472.

The previous prime is 331530936256063. The next prime is 331530936256147. The reversal of 331530936256081 is 180652639035133.

The square root of 331530936256081 is 18207991.

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

It can be written as a sum of positive squares in only one way, i.e., 238999695948225 + 92531240307856 = 15459615^2 + 9619316^2 .

It is not a de Polignac number, because 331530936256081 - 2⁹ = 331530936255569 is a prime.

It is a super-2 number, since 2×331530936256081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331530939256081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 964851750 + ... + 965195296.

Almost surely, 2^{331530936256081} is an apocalyptic number.

331530936256081 is the 18207991-st square number.

331530936256081 is the 9103996-th centered octagonal number.

It is an amenable number.

331530936256081 is a deficient number, since it is larger than the sum of its proper divisors (6374308803210).

331530936256081 is an frugal number, since it uses more digits than its factorization.

331530936256081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687200 (or 343600 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 55.

The spelling of 331530936256081 in words is "three hundred thirty-one trillion, five hundred thirty billion, nine hundred thirty-six million, two hundred fifty-six thousand, eighty-one".