331493761 has 8 divisors (see below), whose sum is σ = 354938760. Its totient is φ = 308487168.

The previous prime is 331493753. The next prime is 331493807. The reversal of 331493761 is 167394133.

It can be written as a sum of positive squares in 4 ways, for example, as 23280625 + 308213136 = 4825^2 + 17556^2 .

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

It is not a de Polignac number, because 331493761 - 2³ = 331493753 is a prime.

It is a super-2 number, since 2×331493761² = 219776227163850242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331493761.

It is not an unprimeable number, because it can be changed into a prime (331493731) 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 in 7 ways as a sum of consecutive naturals, for example, 108036 + ... + 111061.

It is an arithmetic number, because the mean of its divisors is an integer number (44367345).

Almost surely, 2^331493761 is an apocalyptic number.

It is an amenable number.

331493761 is a deficient number, since it is larger than the sum of its proper divisors (23444999).

331493761 is a wasteful number, since it uses less digits than its factorization.

331493761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219203.

The product of its digits is 40824, while the sum is 37.

The square root of 331493761 is about 18206.9701213574. The cubic root of 331493761 is about 692.0834325601.

The spelling of 331493761 in words is "three hundred thirty-one million, four hundred ninety-three thousand, seven hundred sixty-one".