551888091 has 12 divisors (see below), whose sum is σ = 797384640. Its totient is φ = 367827120.

The previous prime is 551888089. The next prime is 551888107. The reversal of 551888091 is 190888155.

551888091 is a `hidden beast` number, since 551 + 8 + 8 + 8 + 0 + 91 = 666.

It is not a de Polignac number, because 551888091 - 2¹ = 551888089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551888011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46825 + ... + 57413.

It is an arithmetic number, because the mean of its divisors is an integer number (66448720).

Almost surely, 2^551888091 is an apocalyptic number.

551888091 is a deficient number, since it is larger than the sum of its proper divisors (245496549).

551888091 is a wasteful number, since it uses less digits than its factorization.

551888091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16386 (or 16383 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 551888091 is about 23492.2985465450. The cubic root of 551888091 is about 820.2577471526.

The spelling of 551888091 in words is "five hundred fifty-one million, eight hundred eighty-eight thousand, ninety-one".