313331131 has 4 divisors (see below), whose sum is σ = 331762392. Its totient is φ = 294899872.

The previous prime is 313331129. The next prime is 313331201. The reversal of 313331131 is 131133313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131133313 = 647 ⋅202679.

It is a cyclic number.

It is not a de Polignac number, because 313331131 - 2¹ = 313331129 is a prime.

It is a super-2 number, since 2×313331131² = 196352795307478322, 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 = 313331099 and 313331108.

It is not an unprimeable number, because it can be changed into a prime (313337131) 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, 9215605 + ... + 9215638.

It is an arithmetic number, because the mean of its divisors is an integer number (82940598).

Almost surely, 2^313331131 is an apocalyptic number.

313331131 is a deficient number, since it is larger than the sum of its proper divisors (18431261).

313331131 is a wasteful number, since it uses less digits than its factorization.

313331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18431260.

The product of its digits is 243, while the sum is 19.

The square root of 313331131 is about 17701.1618545224. The cubic root of 313331131 is about 679.2054813519.

Adding to 313331131 its reverse (131133313), we get a palindrome (444464444).

It can be divided in two parts, 313 and 331131, that multiplied together give a triangular number (103644003 = T₁₄₃₉₇).

The spelling of 313331131 in words is "three hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-one".