331037978881 has 3 divisors (see below), whose sum is σ = 331038554241. Its totient is φ = 331037403522.

The previous prime is 331037978857. The next prime is 331037978903. The reversal of 331037978881 is 188879730133.

The square root of 331037978881 is 575359.

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 331037978881 - 2¹¹ = 331037976833 is a prime.

It is a super-2 number, since 2×331037978881² (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 (331037978081) 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, 287680 + ... + 863038.

It is an arithmetic number, because the mean of its divisors is an integer number (110346184747).

Almost surely, 2^331037978881 is an apocalyptic number.

331037978881 is the 575359-th square number.

331037978881 is the 287680-th centered octagonal number.

It is an amenable number.

331037978881 is a deficient number, since it is larger than the sum of its proper divisors (575360).

331037978881 is an frugal number, since it uses more digits than its factorization.

331037978881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150718 (or 575359 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 331037978881 in words is "three hundred thirty-one billion, thirty-seven million, nine hundred seventy-eight thousand, eight hundred eighty-one".