331561641 has 8 divisors (see below), whose sum is σ = 451488384. Its totient is φ = 216338000.

The previous prime is 331561639. The next prime is 331561663. The reversal of 331561641 is 146165133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331561641 - 2¹ = 331561639 is a prime.

It is a super-2 number, since 2×331561641² = 219866243565225762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331561599 and 331561608.

It is not an unprimeable number, because it can be changed into a prime (331561621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175610 + ... + 1175891.

It is an arithmetic number, because the mean of its divisors is an integer number (56436048).

Almost surely, 2^331561641 is an apocalyptic number.

It is an amenable number.

331561641 is a deficient number, since it is larger than the sum of its proper divisors (119926743).

331561641 is a wasteful number, since it uses less digits than its factorization.

331561641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351551.

The product of its digits is 6480, while the sum is 30.

The square root of 331561641 is about 18208.8341471935. The cubic root of 331561641 is about 692.1306686599.

The spelling of 331561641 in words is "three hundred thirty-one million, five hundred sixty-one thousand, six hundred forty-one".