3131022231 has 6 divisors (see below), whose sum is σ = 4522587680. Its totient is φ = 2087348148.

The previous prime is 3131022229. The next prime is 3131022239. The reversal of 3131022231 is 1322201313.

It is not a de Polignac number, because 3131022231 - 2¹ = 3131022229 is a prime.

It is a super-2 number, since 2×3131022231² = 19606600422032434722, 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 (3131022239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173945671 + ... + 173945688.

Almost surely, 2^3131022231 is an apocalyptic number.

3131022231 is a deficient number, since it is larger than the sum of its proper divisors (1391565449).

3131022231 is a wasteful number, since it uses less digits than its factorization.

3131022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347891365 (or 347891362 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131022231 is about 55955.5379832953. The cubic root of 3131022231 is about 1462.9474190144.

Adding to 3131022231 its reverse (1322201313), we get a palindrome (4453223544).

It can be divided in two parts, 3131022 and 231, that added together give a triangular number (3131253 = T₂₅₀₂).

The spelling of 3131022231 in words is "three billion, one hundred thirty-one million, twenty-two thousand, two hundred thirty-one".