551222155 has 12 divisors (see below), whose sum is σ = 727067376. Its totient is φ = 400888400.

The previous prime is 551222033. The next prime is 551222171.

551222155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551222155 - 2¹¹ = 551220107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454951 + ... + 456160.

It is an arithmetic number, because the mean of its divisors is an integer number (60588948).

Almost surely, 2^551222155 is an apocalyptic number.

551222155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551222155 is a deficient number, since it is larger than the sum of its proper divisors (175845221).

551222155 is a wasteful number, since it uses less digits than its factorization.

551222155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911138 (or 911127 counting only the distinct ones).

The product of its digits is 5000, while the sum is 28.

The square root of 551222155 is about 23478.1207723276. The cubic root of 551222155 is about 819.9276929103.

The spelling of 551222155 in words is "five hundred fifty-one million, two hundred twenty-two thousand, one hundred fifty-five".