3125315640 has 64 divisors (see below), whose sum is σ = 9382579200. Its totient is φ = 832828032.

The previous prime is 3125315621. The next prime is 3125315659. The reversal of 3125315640 is 465135213.

It is an interprime number because it is at equal distance from previous prime (3125315621) and next prime (3125315659).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3125315598 and 3125315607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176721 + ... + 193599.

It is an arithmetic number, because the mean of its divisors is an integer number (146602800).

Almost surely, 2^3125315640 is an apocalyptic number.

3125315640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3125315640 is an abundant number, since it is smaller than the sum of its proper divisors (6257263560).

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

3125315640 is a wasteful number, since it uses less digits than its factorization.

3125315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436 (or 18432 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 3125315640 is about 55904.5225361956. The cubic root of 3125315640 is about 1462.0580907537.

The spelling of 3125315640 in words is "three billion, one hundred twenty-five million, three hundred fifteen thousand, six hundred forty".