2551212520 has 32 divisors (see below), whose sum is σ = 5799414600. Its totient is φ = 1009963008.

The previous prime is 2551212473. The next prime is 2551212523. The reversal of 2551212520 is 252121552.

It can be written as a sum of positive squares in 4 ways, for example, as 1797929604 + 753282916 = 42402^2 + 27446^2 .

It is not an unprimeable number, because it can be changed into a prime (2551212523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324885 + ... + 332644.

Almost surely, 2^2551212520 is an apocalyptic number.

2551212520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551212520 is an abundant number, since it is smaller than the sum of its proper divisors (3248202080).

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

2551212520 is a wasteful number, since it uses less digits than its factorization.

2551212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657637 (or 657633 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2551212520 is about 50509.5290019616. The cubic root of 2551212520 is about 1366.4137150992.

The spelling of 2551212520 in words is "two billion, five hundred fifty-one million, two hundred twelve thousand, five hundred twenty".