551040155 has 8 divisors (see below), whose sum is σ = 661374384. Its totient is φ = 440748000.

The previous prime is 551040151. The next prime is 551040209.

551040155 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 551040155 - 2² = 551040151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551040151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43940 + ... + 55070.

It is an arithmetic number, because the mean of its divisors is an integer number (82671798).

Almost surely, 2^551040155 is an apocalyptic number.

551040155 is a deficient number, since it is larger than the sum of its proper divisors (110334229).

551040155 is a wasteful number, since it uses less digits than its factorization.

551040155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21037.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 551040155 is about 23474.2445032849. The cubic root of 551040155 is about 819.8374429900.

The spelling of 551040155 in words is "five hundred fifty-one million, forty thousand, one hundred fifty-five".