331420329 has 10 divisors (see below), whose sum is σ = 495084810. Its totient is φ = 220946832.

The previous prime is 331420303. The next prime is 331420333. The reversal of 331420329 is 923024133.

It is a happy number.

331420329 is a `hidden beast` number, since 3 + 314 + 20 + 329 = 666.

It can be written as a sum of positive squares in only one way, i.e., 250905600 + 80514729 = 15840^2 + 8973^2 .

It is not a de Polignac number, because 331420329 - 2⁹ = 331419817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (331420129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2045724 + ... + 2045885.

It is an arithmetic number, because the mean of its divisors is an integer number (49508481).

Almost surely, 2^331420329 is an apocalyptic number.

It is an amenable number.

331420329 is a deficient number, since it is larger than the sum of its proper divisors (163664481).

331420329 is an equidigital number, since it uses as much as digits as its factorization.

331420329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091621 (or 4091612 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 331420329 is about 18204.9534193307. The cubic root of 331420329 is about 692.0323256921.

The spelling of 331420329 in words is "three hundred thirty-one million, four hundred twenty thousand, three hundred twenty-nine".