551098891 has 8 divisors (see below), whose sum is σ = 631113984. Its totient is φ = 471405480.

The previous prime is 551098871. The next prime is 551098897. The reversal of 551098891 is 198890155.

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

It is not a de Polignac number, because 551098891 - 2¹³ = 551090699 is a prime.

It is a super-2 number, since 2×551098891² = 607419975322859762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551098897) 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, 76735 + ... + 83608.

It is an arithmetic number, because the mean of its divisors is an integer number (78889248).

Almost surely, 2^551098891 is an apocalyptic number.

551098891 is a deficient number, since it is larger than the sum of its proper divisors (80015093).

551098891 is a wasteful number, since it uses less digits than its factorization.

551098891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160841.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 551098891 is about 23475.4955432255. The cubic root of 551098891 is about 819.8665710918.

It can be divided in two parts, 55109 and 8891, that added together give a cube (64000 = 40³).

The spelling of 551098891 in words is "five hundred fifty-one million, ninety-eight thousand, eight hundred ninety-one".