551645025 has 48 divisors (see below), whose sum is σ = 941457600. Its totient is φ = 284808960.

The previous prime is 551645023. The next prime is 551645033. The reversal of 551645025 is 520546155.

It is not a de Polignac number, because 551645025 - 2¹ = 551645023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551645023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 746106 + ... + 746844.

It is an arithmetic number, because the mean of its divisors is an integer number (19613700).

Almost surely, 2^551645025 is an apocalyptic number.

It is an amenable number.

551645025 is a deficient number, since it is larger than the sum of its proper divisors (389812575).

551645025 is a wasteful number, since it uses less digits than its factorization.

551645025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1053 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 551645025 is about 23487.1246643773. The cubic root of 551645025 is about 820.1373084560.

The spelling of 551645025 in words is "five hundred fifty-one million, six hundred forty-five thousand, twenty-five".