3131313140 has 24 divisors (see below), whose sum is σ = 6699830760. Its totient is φ = 1228892288.

The previous prime is 3131313121. The next prime is 3131313169. The reversal of 3131313140 is 413131313.

3131313140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1133938276 + 1997374864 = 33674^2 + 44692^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1475975 + ... + 1478094.

It is an arithmetic number, because the mean of its divisors is an integer number (279159615).

Almost surely, 2^3131313140 is an apocalyptic number.

It is an amenable number.

3131313140 is an abundant number, since it is smaller than the sum of its proper divisors (3568517620).

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

3131313140 is a wasteful number, since it uses less digits than its factorization.

3131313140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954131 (or 2954129 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 3131313140 is about 55958.1373885872. The cubic root of 3131313140 is about 1462.9927259844.

Adding to 3131313140 its reverse (413131313), we get a palindrome (3544444453).

The spelling of 3131313140 in words is "three billion, one hundred thirty-one million, three hundred thirteen thousand, one hundred forty".