5251547520 has 640 divisors, whose sum is σ = 20393920800. Its totient is φ = 1282867200.

The previous prime is 5251547513. The next prime is 5251547533. The reversal of 5251547520 is 257451525.

5251547520 is a `hidden beast` number, since 52 + 515 + 4 + 75 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 51995470 + ... + 51995570.

Almost surely, 2^5251547520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5251547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10196960400).

5251547520 is an abundant number, since it is smaller than the sum of its proper divisors (15142373280).

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

5251547520 is a wasteful number, since it uses less digits than its factorization.

5251547520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The square root of 5251547520 is about 72467.5618466635. The cubic root of 5251547520 is about 1738.1840745798.

The spelling of 5251547520 in words is "five billion, two hundred fifty-one million, five hundred forty-seven thousand, five hundred twenty".