2520315640 has 16 divisors (see below), whose sum is σ = 5670710280. Its totient is φ = 1008126240.

The previous prime is 2520315631. The next prime is 2520315653. The reversal of 2520315640 is 465130252.

It is a junction number, because it is equal to n+sod(n) for n = 2520315599 and 2520315608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31503906 + ... + 31503985.

Almost surely, 2^2520315640 is an apocalyptic number.

2520315640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520315640 is an abundant number, since it is smaller than the sum of its proper divisors (3150394640).

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

2520315640 is a wasteful number, since it uses less digits than its factorization.

2520315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63007902 (or 63007898 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2520315640 is about 50202.7453432579. The cubic root of 2520315640 is about 1360.8752367879.

Adding to 2520315640 its reverse (465130252), we get a palindrome (2985445892).

The spelling of 2520315640 in words is "two billion, five hundred twenty million, three hundred fifteen thousand, six hundred forty".