551132491 has 24 divisors (see below), whose sum is σ = 684420000. Its totient is φ = 434543616.

The previous prime is 551132479. The next prime is 551132521. The reversal of 551132491 is 194231155.

551132491 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 551132491 - 2¹⁹ = 550608203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551132431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440635 + ... + 441883.

It is an arithmetic number, because the mean of its divisors is an integer number (28517500).

Almost surely, 2^551132491 is an apocalyptic number.

551132491 is a deficient number, since it is larger than the sum of its proper divisors (133287509).

551132491 is a wasteful number, since it uses less digits than its factorization.

551132491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1642 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 551132491 is about 23476.2111721632. The cubic root of 551132491 is about 819.8832329271.

The spelling of 551132491 in words is "five hundred fifty-one million, one hundred thirty-two thousand, four hundred ninety-one".