331363621 has 2 divisors, whose sum is σ = 331363622. Its totient is φ = 331363620.

The previous prime is 331363607. The next prime is 331363631. The reversal of 331363621 is 126363133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317338596 + 14025025 = 17814^2 + 3745^2 .

It is a cyclic number.

It is not a de Polignac number, because 331363621 - 2⁷ = 331363493 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331363621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331363631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165681810 + 165681811.

It is an arithmetic number, because the mean of its divisors is an integer number (165681811).

Almost surely, 2^331363621 is an apocalyptic number.

It is an amenable number.

331363621 is a deficient number, since it is larger than the sum of its proper divisors (1).

331363621 is an equidigital number, since it uses as much as digits as its factorization.

331363621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 28.

The square root of 331363621 is about 18203.3958645084. The cubic root of 331363621 is about 691.9928531510.

The spelling of 331363621 in words is "three hundred thirty-one million, three hundred sixty-three thousand, six hundred twenty-one".