2540515400 has 24 divisors (see below), whose sum is σ = 5906698770. Its totient is φ = 1016206080.

The previous prime is 2540515321. The next prime is 2540515451. The reversal of 2540515400 is 45150452.

It can be written as a sum of positive squares in 3 ways, for example, as 2175476164 + 365039236 = 46642^2 + 19106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2540515400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6351089 + ... + 6351488.

Almost surely, 2^2540515400 is an apocalyptic number.

2540515400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540515400 is an abundant number, since it is smaller than the sum of its proper divisors (3366183370).

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

2540515400 is a wasteful number, since it uses less digits than its factorization.

2540515400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702593 (or 12702584 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2540515400 is about 50403.5256703338. The cubic root of 2540515400 is about 1364.5012691372.

Adding to 2540515400 its reverse (45150452), we get a palindrome (2585665852).

The spelling of 2540515400 in words is "two billion, five hundred forty million, five hundred fifteen thousand, four hundred".