3131640636 has 24 divisors (see below), whose sum is σ = 7477096704. Its totient is φ = 1019603760.

The previous prime is 3131640623. The next prime is 3131640653. The reversal of 3131640636 is 6360461313.

3131640636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3131640597 and 3131640606.

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, 3034020 + ... + 3035051.

It is an arithmetic number, because the mean of its divisors is an integer number (311545696).

Almost surely, 2^3131640636 is an apocalyptic number.

It is an amenable number.

3131640636 is an abundant number, since it is smaller than the sum of its proper divisors (4345456068).

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

3131640636 is a wasteful number, since it uses less digits than its factorization.

3131640636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069121 (or 6069119 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 3131640636 is about 55961.0635710223. The cubic root of 3131640636 is about 1463.0437277572.

The spelling of 3131640636 in words is "three billion, one hundred thirty-one million, six hundred forty thousand, six hundred thirty-six".