551515625 has 28 divisors (see below), whose sum is σ = 704990976. Its totient is φ = 431250000.

The previous prime is 551515621. The next prime is 551515667. The reversal of 551515625 is 526515155.

It is a happy number.

It is not a de Polignac number, because 551515625 - 2² = 551515621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551515621) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 734000 + ... + 734750.

Almost surely, 2^551515625 is an apocalyptic number.

It is an amenable number.

551515625 is a deficient number, since it is larger than the sum of its proper divisors (153475351).

551515625 is an frugal number, since it uses more digits than its factorization.

551515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 803 counting only the distinct ones).

The product of its digits is 37500, while the sum is 35.

The square root of 551515625 is about 23484.3698020620. The cubic root of 551515625 is about 820.0731765947.

The spelling of 551515625 in words is "five hundred fifty-one million, five hundred fifteen thousand, six hundred twenty-five".