2521513240 has 32 divisors (see below), whose sum is σ = 5703125760. Its totient is φ = 1003321600.

The previous prime is 2521513217. The next prime is 2521513261. The reversal of 2521513240 is 423151252.

It is a congruent number.

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, 157381 + ... + 172660.

It is an arithmetic number, because the mean of its divisors is an integer number (178222680).

Almost surely, 2^2521513240 is an apocalyptic number.

2521513240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521513240 is an abundant number, since it is smaller than the sum of its proper divisors (3181612520).

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

2521513240 is a wasteful number, since it uses less digits than its factorization.

2521513240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330243 (or 330239 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2521513240 is about 50214.6715612081. The cubic root of 2521513240 is about 1361.0907555745.

Adding to 2521513240 its reverse (423151252), we get a palindrome (2944664492).

The spelling of 2521513240 in words is "two billion, five hundred twenty-one million, five hundred thirteen thousand, two hundred forty".