551161999 has 8 divisors (see below), whose sum is σ = 563710752. Its totient is φ = 538692960.

The previous prime is 551161993. The next prime is 551162021. The reversal of 551161999 is 999161155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551161999 - 2³ = 551161991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551161991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5832 + ... + 33709.

It is an arithmetic number, because the mean of its divisors is an integer number (70463844).

Almost surely, 2^551161999 is an apocalyptic number.

551161999 is a deficient number, since it is larger than the sum of its proper divisors (12548753).

551161999 is a wasteful number, since it uses less digits than its factorization.

551161999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39857.

The product of its digits is 109350, while the sum is 46.

The square root of 551161999 is about 23476.8396297287. The cubic root of 551161999 is about 819.8978650305.

The spelling of 551161999 in words is "five hundred fifty-one million, one hundred sixty-one thousand, nine hundred ninety-nine".