320927431 has 8 divisors (see below), whose sum is σ = 351232128. Its totient is φ = 290811000.

The previous prime is 320927429. The next prime is 320927437. The reversal of 320927431 is 134729023.

320927431 = 385² + 386² + ... + 1006².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320927431 - 2¹ = 320927429 is a prime.

It is a super-2 number, since 2×320927431² = 205988831936519522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320927393 and 320927402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320927437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43485 + ... + 50326.

It is an arithmetic number, because the mean of its divisors is an integer number (43904016).

Almost surely, 2^320927431 is an apocalyptic number.

320927431 is a deficient number, since it is larger than the sum of its proper divisors (30304697).

320927431 is a wasteful number, since it uses less digits than its factorization.

320927431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94133.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 320927431 is about 17914.4475493943. The cubic root of 320927431 is about 684.6505266217.

The spelling of 320927431 in words is "three hundred twenty million, nine hundred twenty-seven thousand, four hundred thirty-one".