331980401 has 2 divisors, whose sum is σ = 331980402. Its totient is φ = 331980400.

The previous prime is 331980379. The next prime is 331980443. The reversal of 331980401 is 104089133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191794801 + 140185600 = 13849^2 + 11840^2 .

It is an emirp because it is prime and its reverse (104089133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331980401 is a prime.

It is a super-2 number, since 2×331980401² = 220421973296241602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331980461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165990200 + 165990201.

It is an arithmetic number, because the mean of its divisors is an integer number (165990201).

Almost surely, 2^331980401 is an apocalyptic number.

It is an amenable number.

331980401 is a deficient number, since it is larger than the sum of its proper divisors (1).

331980401 is an equidigital number, since it uses as much as digits as its factorization.

331980401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 331980401 is about 18220.3293329182. The cubic root of 331980401 is about 692.4219314479.

The spelling of 331980401 in words is "three hundred thirty-one million, nine hundred eighty thousand, four hundred one".