313231123 has 2 divisors, whose sum is σ = 313231124. Its totient is φ = 313231122.

The previous prime is 313231081. The next prime is 313231133. The reversal of 313231123 is 321132313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313231123 is a prime.

It is a super-2 number, since 2×313231123² = 196227472831682258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 313231123.

It is not a weakly prime, because it can be changed into another prime (313231133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156615561 + 156615562.

It is an arithmetic number, because the mean of its divisors is an integer number (156615562).

Almost surely, 2^313231123 is an apocalyptic number.

313231123 is a deficient number, since it is larger than the sum of its proper divisors (1).

313231123 is an equidigital number, since it uses as much as digits as its factorization.

313231123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 313231123 is about 17698.3367297608. The cubic root of 313231123 is about 679.1332114718.

Adding to 313231123 its reverse (321132313), we get a palindrome (634363436).

The spelling of 313231123 in words is "three hundred thirteen million, two hundred thirty-one thousand, one hundred twenty-three".