313321431 has 8 divisors (see below), whose sum is σ = 422795520. Its totient is φ = 206364152.

The previous prime is 313321409. The next prime is 313321453. The reversal of 313321431 is 134123313.

It is an interprime number because it is at equal distance from previous prime (313321409) and next prime (313321453).

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 313321431 - 2⁵ = 313321399 is a prime.

It is a super-2 number, since 2×313321431² = 196340638247775522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313321398 and 313321407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313321471) 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, 628911 + ... + 629408.

It is an arithmetic number, because the mean of its divisors is an integer number (52849440).

Almost surely, 2^313321431 is an apocalyptic number.

313321431 is a deficient number, since it is larger than the sum of its proper divisors (109474089).

313321431 is a wasteful number, since it uses less digits than its factorization.

313321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258405.

The product of its digits is 648, while the sum is 21.

The square root of 313321431 is about 17700.8878590877. The cubic root of 313321431 is about 679.1984724078.

Adding to 313321431 its reverse (134123313), we get a palindrome (447444744).

The spelling of 313321431 in words is "three hundred thirteen million, three hundred twenty-one thousand, four hundred thirty-one".