551000155 has 8 divisors (see below), whose sum is σ = 664524000. Its totient is φ = 438584256.

The previous prime is 551000117. The next prime is 551000159.

551000155 is nontrivially palindromic in base 10.

551000155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 551000155 - 2²⁵ = 517445723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551000159) 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, 275890 + ... + 277879.

It is an arithmetic number, because the mean of its divisors is an integer number (83065500).

Almost surely, 2^551000155 is an apocalyptic number.

551000155 is a deficient number, since it is larger than the sum of its proper divisors (113523845).

551000155 is a wasteful number, since it uses less digits than its factorization.

551000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553973.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 551000155 is about 23473.3924902218. The cubic root of 551000155 is about 819.8176051790.

It can be divided in two parts, 551000 and 155, that added together give a palindrome (551155).

The spelling of 551000155 in words is "five hundred fifty-one million, one hundred fifty-five", and thus it is an aban number.