2521323240 has 64 divisors (see below), whose sum is σ = 7574636160. Its totient is φ = 671404800.

The previous prime is 2521323239. The next prime is 2521323263. The reversal of 2521323240 is 423231252.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2521323240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72790 + ... + 101690.

It is an arithmetic number, because the mean of its divisors is an integer number (118353690).

Almost surely, 2^2521323240 is an apocalyptic number.

2521323240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521323240 is an abundant number, since it is smaller than the sum of its proper divisors (5053312920).

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

2521323240 is a wasteful number, since it uses less digits than its factorization.

2521323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29642 (or 29638 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2521323240 is about 50212.7796482131. The cubic root of 2521323240 is about 1361.0565679373.

Adding to 2521323240 its reverse (423231252), we get a palindrome (2944554492).

The spelling of 2521323240 in words is "two billion, five hundred twenty-one million, three hundred twenty-three thousand, two hundred forty".