313331231 has 4 divisors (see below), whose sum is σ = 326954352. Its totient is φ = 299708112.

The previous prime is 313331201. The next prime is 313331287. The reversal of 313331231 is 132133313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 313331231 - 2¹⁸ = 313069087 is a prime.

It is a super-2 number, since 2×313331231² = 196352920639950722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313331201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6811526 + ... + 6811571.

It is an arithmetic number, because the mean of its divisors is an integer number (81738588).

Almost surely, 2^313331231 is an apocalyptic number.

313331231 is a deficient number, since it is larger than the sum of its proper divisors (13623121).

313331231 is a wasteful number, since it uses less digits than its factorization.

313331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623120.

The product of its digits is 486, while the sum is 20.

The square root of 313331231 is about 17701.1646791955. The cubic root of 313331231 is about 679.2055536083.

Adding to 313331231 its reverse (132133313), we get a palindrome (445464544).

The spelling of 313331231 in words is "three hundred thirteen million, three hundred thirty-one thousand, two hundred thirty-one".