551011165 has 16 divisors (see below), whose sum is σ = 690087600. Its totient is φ = 421829632.

The previous prime is 551011133. The next prime is 551011189. The reversal of 551011165 is 561110155.

It can be written as a sum of positive squares in 8 ways, for example, as 153487321 + 397523844 = 12389^2 + 19938^2 .

It is a cyclic number.

It is not a de Polignac number, because 551011165 - 2⁵ = 551011133 is a prime.

It is a super-2 number, since 2×551011165² = 607226607909314450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430 + ... + 33199.

It is an arithmetic number, because the mean of its divisors is an integer number (43130475).

Almost surely, 2^551011165 is an apocalyptic number.

It is an amenable number.

551011165 is a deficient number, since it is larger than the sum of its proper divisors (139076435).

551011165 is a wasteful number, since it uses less digits than its factorization.

551011165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33776.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 551011165 is about 23473.6270099020. The cubic root of 551011165 is about 819.8230656322.

The spelling of 551011165 in words is "five hundred fifty-one million, eleven thousand, one hundred sixty-five".