551125165 has 4 divisors (see below), whose sum is σ = 661350204. Its totient is φ = 440900128.

The previous prime is 551125151. The next prime is 551125171. The reversal of 551125165 is 561521155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270964521 + 280160644 = 16461^2 + 16738^2 .

It is a cyclic number.

It is not a de Polignac number, because 551125165 - 2¹¹ = 551123117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55112512 + ... + 55112521.

It is an arithmetic number, because the mean of its divisors is an integer number (165337551).

Almost surely, 2^551125165 is an apocalyptic number.

It is an amenable number.

551125165 is a deficient number, since it is larger than the sum of its proper divisors (110225039).

551125165 is a wasteful number, since it uses less digits than its factorization.

551125165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110225038.

The product of its digits is 7500, while the sum is 31.

The square root of 551125165 is about 23476.0551413563. The cubic root of 551125165 is about 819.8796001097.

The spelling of 551125165 in words is "five hundred fifty-one million, one hundred twenty-five thousand, one hundred sixty-five".