3131111380 has 24 divisors (see below), whose sum is σ = 6576385032. Its totient is φ = 1252244352.

The previous prime is 3131111351. The next prime is 3131111407. The reversal of 3131111380 is 831111313.

It can be written as a sum of positive squares in 4 ways, for example, as 3617604 + 3127493776 = 1902^2 + 55924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241134 + ... + 253786.

It is an arithmetic number, because the mean of its divisors is an integer number (274016043).

Almost surely, 2^3131111380 is an apocalyptic number.

It is an amenable number.

3131111380 is an abundant number, since it is smaller than the sum of its proper divisors (3445273652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131111380 is a wasteful number, since it uses less digits than its factorization.

3131111380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25035 (or 25033 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 3131111380 is about 55956.3345833159. The cubic root of 3131111380 is about 1462.9613036238.

Adding to 3131111380 its reverse (831111313), we get a palindrome (3962222693).

The spelling of 3131111380 in words is "three billion, one hundred thirty-one million, one hundred eleven thousand, three hundred eighty".