331431023 has 16 divisors (see below), whose sum is σ = 418880256. Its totient is φ = 254715840.

The previous prime is 331431019. The next prime is 331431029. The reversal of 331431023 is 320134133.

It is a cyclic number.

It is not a de Polignac number, because 331431023 - 2² = 331431019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331430986 and 331431004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331431029) 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, 23861 + ... + 35102.

It is an arithmetic number, because the mean of its divisors is an integer number (26180016).

Almost surely, 2^331431023 is an apocalyptic number.

331431023 is a deficient number, since it is larger than the sum of its proper divisors (87449233).

331431023 is a wasteful number, since it uses less digits than its factorization.

331431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59054.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 331431023 is about 18205.2471282320. The cubic root of 331431023 is about 692.0397689230.

Adding to 331431023 its reverse (320134133), we get a palindrome (651565156).

The spelling of 331431023 in words is "three hundred thirty-one million, four hundred thirty-one thousand, twenty-three".