313023131 has 4 divisors (see below), whose sum is σ = 313275000. Its totient is φ = 312771264.

The previous prime is 313023127. The next prime is 313023133. The reversal of 313023131 is 131320313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131320313 = 563 ⋅233251.

It is a cyclic number.

It is not a de Polignac number, because 313023131 - 2² = 313023127 is a prime.

It is a super-2 number, since 2×313023131² = 195966961082086322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313023133) 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, 124061 + ... + 126558.

It is an arithmetic number, because the mean of its divisors is an integer number (78318750).

Almost surely, 2^313023131 is an apocalyptic number.

313023131 is a deficient number, since it is larger than the sum of its proper divisors (251869).

313023131 is a wasteful number, since it uses less digits than its factorization.

313023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251868.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 313023131 is about 17692.4597215876. The cubic root of 313023131 is about 678.9828586478.

Adding to 313023131 its reverse (131320313), we get a palindrome (444343444).

The spelling of 313023131 in words is "three hundred thirteen million, twenty-three thousand, one hundred thirty-one".