331492481 has 2 divisors, whose sum is σ = 331492482. Its totient is φ = 331492480.

The previous prime is 331492477. The next prime is 331492493. The reversal of 331492481 is 184294133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 153536881 = 13340^2 + 12391^2 .

It is an emirp because it is prime and its reverse (184294133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331492481 - 2² = 331492477 is a prime.

It is a super-2 number, since 2×331492481² = 219774529919070722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (331492471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165746240 + 165746241.

It is an arithmetic number, because the mean of its divisors is an integer number (165746241).

Almost surely, 2^331492481 is an apocalyptic number.

It is an amenable number.

331492481 is a deficient number, since it is larger than the sum of its proper divisors (1).

331492481 is an equidigital number, since it uses as much as digits as its factorization.

331492481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 331492481 is about 18206.9349699503. The cubic root of 331492481 is about 692.0825417762.

The spelling of 331492481 in words is "three hundred thirty-one million, four hundred ninety-two thousand, four hundred eighty-one".