3131201231 has 4 divisors (see below), whose sum is σ = 3139923600. Its totient is φ = 3122478864.

The previous prime is 3131201173. The next prime is 3131201233. The reversal of 3131201231 is 1321021313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321021313 = 1759 ⋅751007.

It is a cyclic number.

It is not a de Polignac number, because 3131201231 - 2⁶ = 3131201167 is a prime.

It is a super-2 number, since 2×3131201231² = 19608842298031830722, 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 (3131201233) 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, 4360646 + ... + 4361363.

It is an arithmetic number, because the mean of its divisors is an integer number (784980900).

Almost surely, 2^3131201231 is an apocalyptic number.

3131201231 is a deficient number, since it is larger than the sum of its proper divisors (8722369).

3131201231 is an equidigital number, since it uses as much as digits as its factorization.

3131201231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722368.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3131201231 is about 55957.1374446549. The cubic root of 3131201231 is about 1462.9752973003.

Adding to 3131201231 its reverse (1321021313), we get a palindrome (4452222544).

The spelling of 3131201231 in words is "three billion, one hundred thirty-one million, two hundred one thousand, two hundred thirty-one".