551121155 has 16 divisors (see below), whose sum is σ = 718883424. Its totient is φ = 403173120.

The previous prime is 551121149. The next prime is 551121169.

551121155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551121155 - 2⁶ = 551121091 is a prime.

It is a Duffinian 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, 32666 + ... + 46575.

It is an arithmetic number, because the mean of its divisors is an integer number (44930214).

Almost surely, 2^551121155 is an apocalyptic number.

551121155 is a deficient number, since it is larger than the sum of its proper divisors (167762269).

551121155 is a wasteful number, since it uses less digits than its factorization.

551121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79366.

The product of its digits is 1250, while the sum is 26.

The square root of 551121155 is about 23475.9697350291. The cubic root of 551121155 is about 819.8776116169.

The spelling of 551121155 in words is "five hundred fifty-one million, one hundred twenty-one thousand, one hundred fifty-five".