5251320520 has 16 divisors (see below), whose sum is σ = 11815471260. Its totient is φ = 2100528192.

The previous prime is 5251320461. The next prime is 5251320521. The reversal of 5251320520 is 250231525.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4764588676 + 486731844 = 69026^2 + 22062^2 .

It is not an unprimeable number, because it can be changed into a prime (5251320521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65641467 + ... + 65641546.

Almost surely, 2^5251320520 is an apocalyptic number.

It is an amenable number.

5251320520 is an abundant number, since it is smaller than the sum of its proper divisors (6564150740).

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

5251320520 is a wasteful number, since it uses less digits than its factorization.

5251320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131283024 (or 131283020 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 5251320520 is about 72465.9956117350. The cubic root of 5251320520 is about 1738.1590296784.

The spelling of 5251320520 in words is "five billion, two hundred fifty-one million, three hundred twenty thousand, five hundred twenty".