551242155 has 64 divisors (see below), whose sum is σ = 981319680. Its totient is φ = 263088000.

The previous prime is 551242151. The next prime is 551242207.

551242155 is nontrivially palindromic in base 10.

551242155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 551242155 - 2² = 551242151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551242151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379180 + ... + 380630.

It is an arithmetic number, because the mean of its divisors is an integer number (15333120).

Almost surely, 2^551242155 is an apocalyptic number.

551242155 is a deficient number, since it is larger than the sum of its proper divisors (430077525).

551242155 is a wasteful number, since it uses less digits than its factorization.

551242155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its digits is 10000, while the sum is 30.

The square root of 551242155 is about 23478.5466969316. The cubic root of 551242155 is about 819.9376092725.

Adding to 551242155 its product of digits (10000), we get a palindrome (551252155).

Subtracting from 551242155 its product of digits (10000), we obtain a palindrome (551232155).

The spelling of 551242155 in words is "five hundred fifty-one million, two hundred forty-two thousand, one hundred fifty-five".