5251520736 has 384 divisors, whose sum is σ = 19242316800. Its totient is φ = 1353646080.

The previous prime is 5251520723. The next prime is 5251520737. The reversal of 5251520736 is 6370251525.

5251520736 is a `hidden beast` number, since 52 + 51 + 520 + 7 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 5251520736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251520737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12839700 + ... + 12840108.

It is an arithmetic number, because the mean of its divisors is an integer number (50110200).

Almost surely, 2^5251520736 is an apocalyptic number.

5251520736 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5251520736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9621158400).

5251520736 is an abundant number, since it is smaller than the sum of its proper divisors (13990796064).

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

5251520736 is a wasteful number, since it uses less digits than its factorization.

5251520736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 5251520736 is about 72467.3770465028. The cubic root of 5251520736 is about 1738.1811195397.

The spelling of 5251520736 in words is "five billion, two hundred fifty-one million, five hundred twenty thousand, seven hundred thirty-six".