551521596025 has 27 divisors (see below), whose sum is σ = 726564962919. Its totient is φ = 415215790080.

The previous prime is 551521596023. The next prime is 551521596169. The reversal of 551521596025 is 520695125155.

The square root of 551521596025 is 742645.

It is a perfect power (a square), and thus also a powerful number.

551521596025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 258792986089 + 292728609936 = 508717^2 + 541044^2 .

It is not a de Polignac number, because 551521596025 - 2¹ = 551521596023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551521596023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 63120457 + ... + 63129193.

Almost surely, 2^551521596025 is an apocalyptic number.

551521596025 is the 742645-th square number.

551521596025 is the 371323-rd centered octagonal number.

It is an amenable number.

551521596025 is a deficient number, since it is larger than the sum of its proper divisors (175043366894).

551521596025 is an frugal number, since it uses more digits than its factorization.

551521596025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17518 (or 8759 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 551521596025 in words is "five hundred fifty-one billion, five hundred twenty-one million, five hundred ninety-six thousand, twenty-five".