331420285 has 16 divisors (see below), whose sum is σ = 466805376. Its totient is φ = 221116608.

The previous prime is 331420283. The next prime is 331420303. The reversal of 331420285 is 582024133.

It is a cyclic number.

It is not a de Polignac number, because 331420285 - 2¹ = 331420283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331420283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126667 + ... + 129256.

It is an arithmetic number, because the mean of its divisors is an integer number (29175336).

Almost surely, 2^331420285 is an apocalyptic number.

331420285 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331420285 is a deficient number, since it is larger than the sum of its proper divisors (135385091).

331420285 is a wasteful number, since it uses less digits than its factorization.

331420285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255972.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 331420285 is about 18204.9522108683. The cubic root of 331420285 is about 692.0322950669.

It can be divided in two parts, 331420 and 285, that added together give a triangular number (331705 = T₈₁₄).

The spelling of 331420285 in words is "three hundred thirty-one million, four hundred twenty thousand, two hundred eighty-five".