320355431 has 32 divisors (see below), whose sum is σ = 385689600. Its totient is φ = 262958080.

The previous prime is 320355419. The next prime is 320355437. The reversal of 320355431 is 134553023.

It is not a de Polignac number, because 320355431 - 2⁶ = 320355367 is a prime.

It is a super-2 number, since 2×320355431² = 205255204342391522, 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 320355431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320355437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344375 + ... + 345303.

It is an arithmetic number, because the mean of its divisors is an integer number (12052800).

Almost surely, 2^320355431 is an apocalyptic number.

320355431 is a deficient number, since it is larger than the sum of its proper divisors (65334169).

320355431 is a wasteful number, since it uses less digits than its factorization.

320355431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 320355431 is about 17898.4756613517. The cubic root of 320355431 is about 684.2435259937.

The spelling of 320355431 in words is "three hundred twenty million, three hundred fifty-five thousand, four hundred thirty-one".