551404155 has 32 divisors (see below), whose sum is σ = 913342464. Its totient is φ = 283844736.

The previous prime is 551404153. The next prime is 551404157.

551404155 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (551404153) and next prime (551404157).

It is not a de Polignac number, because 551404155 - 2¹ = 551404153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551404153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66574 + ... + 74396.

It is an arithmetic number, because the mean of its divisors is an integer number (28541952).

Almost surely, 2^551404155 is an apocalyptic number.

551404155 is a deficient number, since it is larger than the sum of its proper divisors (361938309).

551404155 is a wasteful number, since it uses less digits than its factorization.

551404155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995.

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

The square root of 551404155 is about 23481.9964014987. The cubic root of 551404155 is about 820.0179229674.

Adding to 551404155 its product of nonzero digits (10000), we get a palindrome (551414155).

It can be divided in two parts, 55140 and 4155, that added together give a palindrome (59295).

The spelling of 551404155 in words is "five hundred fifty-one million, four hundred four thousand, one hundred fifty-five".