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313130331 = 32233149323
BaseRepresentation
bin10010101010011…
…111110101011011
3210211012200001200
4102222133311123
51120130132311
651023245243
710521364263
oct2252376533
9724180050
10313130331
111508324a8
1288a49823
134cb47427
142d8307a3
151c754556
hex12a9fd5b

313130331 has 12 divisors (see below), whose sum is σ = 454243608. Its totient is φ = 207856224.

The previous prime is 313130273. The next prime is 313130333. The reversal of 313130331 is 133031313.

It is not a de Polignac number, because 313130331 - 26 = 313130267 is a prime.

It is a super-2 number, since 2×3131303312 = 196101208384339122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (313130333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72565 + ... + 76758.

It is an arithmetic number, because the mean of its divisors is an integer number (37853634).

Almost surely, 2313130331 is an apocalyptic number.

313130331 is a deficient number, since it is larger than the sum of its proper divisors (141113277).

313130331 is a wasteful number, since it uses less digits than its factorization.

313130331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149562 (or 149559 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 18.

The square root of 313130331 is about 17695.4890014376. The cubic root of 313130331 is about 679.0603594752.

Adding to 313130331 its reverse (133031313), we get a palindrome (446161644).

The spelling of 313130331 in words is "three hundred thirteen million, one hundred thirty thousand, three hundred thirty-one".

Divisors: 1 3 9 233 699 2097 149323 447969 1343907 34792259 104376777 313130331