2315519640 has 96 divisors (see below), whose sum is σ = 8600510880. Its totient is φ = 529261056.

The previous prime is 2315519639. The next prime is 2315519659. The reversal of 2315519640 is 469155132.

2315519640 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 5 + 1 + 9 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2315519595 and 2315519604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456909 + ... + 461948.

It is an arithmetic number, because the mean of its divisors is an integer number (89588655).

Almost surely, 2^2315519640 is an apocalyptic number.

2315519640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2315519640 is an abundant number, since it is smaller than the sum of its proper divisors (6284991240).

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

2315519640 is a wasteful number, since it uses less digits than its factorization.

2315519640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918881 (or 918874 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2315519640 is about 48119.8466331721. The cubic root of 2315519640 is about 1322.9684571779.

The spelling of 2315519640 in words is "two billion, three hundred fifteen million, five hundred nineteen thousand, six hundred forty".