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320313031 = 17142313241
BaseRepresentation
bin10011000101111…
…001011011000111
3211022201120212121
4103011321123013
51124000004111
651441230411
710636421143
oct2305713307
9738646777
10320313031
11154898a15
128b332407
135149084c
1430780223
151d1c2871
hex131796c7

320313031 has 8 divisors (see below), whose sum is σ = 339418944. Its totient is φ = 301236480.

The previous prime is 320313023. The next prime is 320313043. The reversal of 320313031 is 130313023.

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 320313031 - 23 = 320313023 is a prime.

It is a super-2 number, since 2×3203130312 = 205200875656813922, 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 = 320312996 and 320313014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320313061) 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, 17571 + ... + 30811.

It is an arithmetic number, because the mean of its divisors is an integer number (42427368).

Almost surely, 2320313031 is an apocalyptic number.

320313031 is a deficient number, since it is larger than the sum of its proper divisors (19105913).

320313031 is a wasteful number, since it uses less digits than its factorization.

320313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 320313031 is about 17897.2911637488. The cubic root of 320313031 is about 684.2133374357.

Adding to 320313031 its reverse (130313023), we get a palindrome (450626054).

The spelling of 320313031 in words is "three hundred twenty million, three hundred thirteen thousand, thirty-one".

Divisors: 1 17 1423 13241 24191 225097 18841943 320313031