2515145540 has 24 divisors (see below), whose sum is σ = 5284123992. Its totient is φ = 1005616640.

The previous prime is 2515145527. The next prime is 2515145561. The reversal of 2515145540 is 455415152.

It can be written as a sum of positive squares in 4 ways, for example, as 456164164 + 2058981376 = 21358^2 + 45376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2515145497 and 2515145506.

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, 21212 + ... + 74028.

It is an arithmetic number, because the mean of its divisors is an integer number (220171833).

Almost surely, 2^2515145540 is an apocalyptic number.

2515145540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515145540 is an abundant number, since it is smaller than the sum of its proper divisors (2768978452).

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

2515145540 is a wasteful number, since it uses less digits than its factorization.

2515145540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55207 (or 55205 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 2515145540 is about 50151.2267048374. The cubic root of 2515145540 is about 1359.9440468618.

The spelling of 2515145540 in words is "two billion, five hundred fifteen million, one hundred forty-five thousand, five hundred forty".