551551225 has 12 divisors (see below), whose sum is σ = 705986560. Its totient is φ = 427006800.

The previous prime is 551551211. The next prime is 551551237. The reversal of 551551225 is 522155155.

It is not a de Polignac number, because 551551225 - 2⁷ = 551551097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355065 + ... + 356614.

Almost surely, 2^551551225 is an apocalyptic number.

It is an amenable number.

551551225 is a deficient number, since it is larger than the sum of its proper divisors (154435335).

551551225 is a wasteful number, since it uses less digits than its factorization.

551551225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711720 (or 711715 counting only the distinct ones).

The product of its digits is 12500, while the sum is 31.

The square root of 551551225 is about 23485.1277407639. The cubic root of 551551225 is about 820.0908212909.

The spelling of 551551225 in words is "five hundred fifty-one million, five hundred fifty-one thousand, two hundred twenty-five".