331663001 has 2 divisors, whose sum is σ = 331663002. Its totient is φ = 331663000.

The previous prime is 331662997. The next prime is 331663043. The reversal of 331663001 is 100366133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238733401 + 92929600 = 15451^2 + 9640^2 .

It is a cyclic number.

It is not a de Polignac number, because 331663001 - 2² = 331662997 is a prime.

It is a super-2 number, since 2×331663001² = 220000692464652002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331663051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165831500 + 165831501.

It is an arithmetic number, because the mean of its divisors is an integer number (165831501).

Almost surely, 2^331663001 is an apocalyptic number.

It is an amenable number.

331663001 is a deficient number, since it is larger than the sum of its proper divisors (1).

331663001 is an equidigital number, since it uses as much as digits as its factorization.

331663001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 331663001 is about 18211.6171989200. The cubic root of 331663001 is about 692.2011907070.

The spelling of 331663001 in words is "three hundred thirty-one million, six hundred sixty-three thousand, one".