551631169 has 4 divisors (see below), whose sum is σ = 551975620. Its totient is φ = 551286720.

The previous prime is 551631137. The next prime is 551631173. The reversal of 551631169 is 961136155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 479040769 + 72590400 = 21887^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 551631169 - 2⁵ = 551631137 is a prime.

It is a super-2 number, since 2×551631169² = 608593893224613122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551631469) 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 3 ways as a sum of consecutive naturals, for example, 169812 + ... + 173029.

It is an arithmetic number, because the mean of its divisors is an integer number (137993905).

Almost surely, 2^551631169 is an apocalyptic number.

It is an amenable number.

551631169 is a deficient number, since it is larger than the sum of its proper divisors (344451).

551631169 is a wasteful number, since it uses less digits than its factorization.

551631169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344450.

The product of its digits is 24300, while the sum is 37.

The square root of 551631169 is about 23486.8296924042. The cubic root of 551631169 is about 820.1304417711.

The spelling of 551631169 in words is "five hundred fifty-one million, six hundred thirty-one thousand, one hundred sixty-nine".