551545225 has 81 divisors (see below), whose sum is σ = 889046613. Its totient is φ = 338184000.

The previous prime is 551545217. The next prime is 551545249. The reversal of 551545225 is 522545155.

The square root of 551545225 is 23485.

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

It can be written as a sum of positive squares in 4 ways, for example, as 254051721 + 297493504 = 15939^2 + 17248^2 .

It is not a de Polignac number, because 551545225 - 2³ = 551545217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 9041695 + ... + 9041755.

Almost surely, 2^551545225 is an apocalyptic number.

551545225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551545225 is the 23485-th square number.

551545225 is the 11743-rd centered octagonal number.

It is an amenable number.

551545225 is a deficient number, since it is larger than the sum of its proper divisors (337501388).

551545225 is a wasteful number, since it uses less digits than its factorization.

551545225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 84 counting only the distinct ones).

The product of its digits is 50000, while the sum is 34.

The cubic root of 551545225 is about 820.0878475189.

The spelling of 551545225 in words is "five hundred fifty-one million, five hundred forty-five thousand, two hundred twenty-five".