320947031 has 16 divisors (see below), whose sum is σ = 350700000. Its totient is φ = 292553856.

The previous prime is 320947021. The next prime is 320947049. The reversal of 320947031 is 130749023.

It is not a de Polignac number, because 320947031 - 2¹⁴ = 320930647 is a prime.

It is a super-2 number, since 2×320947031² = 206013993415429922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320946985 and 320947003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320947021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191465 + ... + 193133.

It is an arithmetic number, because the mean of its divisors is an integer number (21918750).

Almost surely, 2^320947031 is an apocalyptic number.

320947031 is a deficient number, since it is larger than the sum of its proper divisors (29752969).

320947031 is a wasteful number, since it uses less digits than its factorization.

320947031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 320947031 is about 17914.9945855420. The cubic root of 320947031 is about 684.6644642244.

The spelling of 320947031 in words is "three hundred twenty million, nine hundred forty-seven thousand, thirty-one".