2521551540 has 48 divisors (see below), whose sum is σ = 7067511360. Its totient is φ = 671731200.

The previous prime is 2521551521. The next prime is 2521551553. The reversal of 2521551540 is 451551252.

2521551540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2521551498 and 2521551507.

It is a congruent number.

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, 39715 + ... + 81365.

It is an arithmetic number, because the mean of its divisors is an integer number (147239820).

Almost surely, 2^2521551540 is an apocalyptic number.

2521551540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521551540 is an abundant number, since it is smaller than the sum of its proper divisors (4545959820).

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

2521551540 is a wasteful number, since it uses less digits than its factorization.

2521551540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42672 (or 42670 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 2521551540 is about 50215.0529224056. The cubic root of 2521551540 is about 1361.0976468744.

The spelling of 2521551540 in words is "two billion, five hundred twenty-one million, five hundred fifty-one thousand, five hundred forty".