331020431 has 6 divisors (see below), whose sum is σ = 385064640. Its totient is φ = 283731756.

The previous prime is 331020409. The next prime is 331020433. The reversal of 331020431 is 134020133.

It is a happy number.

It is not a de Polignac number, because 331020431 - 2⁶ = 331020367 is a prime.

It is a super-2 number, since 2×331020431² = 219149051478851522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331020433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3377711 + ... + 3377808.

It is an arithmetic number, because the mean of its divisors is an integer number (64177440).

Almost surely, 2^331020431 is an apocalyptic number.

331020431 is a deficient number, since it is larger than the sum of its proper divisors (54044209).

331020431 is an equidigital number, since it uses as much as digits as its factorization.

331020431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755533 (or 6755526 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331020431 is about 18193.9668846571. The cubic root of 331020431 is about 691.7538739286.

Adding to 331020431 its reverse (134020133), we get a palindrome (465040564).

The spelling of 331020431 in words is "three hundred thirty-one million, twenty thousand, four hundred thirty-one".