551556155 has 8 divisors (see below), whose sum is σ = 662153184. Its totient is φ = 441054400.

The previous prime is 551556121. The next prime is 551556157. The reversal of 551556155 is 551655155.

It is a happy number.

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

It is not a de Polignac number, because 551556155 - 2¹² = 551552059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551556157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10391 + ... + 34800.

It is an arithmetic number, because the mean of its divisors is an integer number (82769148).

Almost surely, 2^551556155 is an apocalyptic number.

551556155 is a deficient number, since it is larger than the sum of its proper divisors (110597029).

551556155 is a wasteful number, since it uses less digits than its factorization.

551556155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47637.

The product of its digits is 93750, while the sum is 38.

The square root of 551556155 is about 23485.2327005717. The cubic root of 551556155 is about 820.0932647240.

The spelling of 551556155 in words is "five hundred fifty-one million, five hundred fifty-six thousand, one hundred fifty-five".