2521630388 has 24 divisors (see below), whose sum is σ = 4622822400. Its totient is φ = 1201925088.

The previous prime is 2521630273. The next prime is 2521630393. The reversal of 2521630388 is 8830361252.

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, 128420 + ... + 146747.

It is an arithmetic number, because the mean of its divisors is an integer number (192617600).

Almost surely, 2^2521630388 is an apocalyptic number.

It is an amenable number.

2521630388 is a deficient number, since it is larger than the sum of its proper divisors (2101192012).

2521630388 is a wasteful number, since it uses less digits than its factorization.

2521630388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275279 (or 275277 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2521630388 is about 50215.8380194934. The cubic root of 2521630388 is about 1361.1118337361. Note that the first 3 decimals are identical.

The spelling of 2521630388 in words is "two billion, five hundred twenty-one million, six hundred thirty thousand, three hundred eighty-eight".