551290861 has 8 divisors (see below), whose sum is σ = 617662944. Its totient is φ = 487627920.

The previous prime is 551290849. The next prime is 551290891. The reversal of 551290861 is 168092155.

551290861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 9586-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 551290861 - 2¹¹ = 551288813 is a prime.

It is a super-2 number, since 2×551290861² = 607843226844242642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551290861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551290801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676855 + ... + 677668.

It is an arithmetic number, because the mean of its divisors is an integer number (77207868).

Almost surely, 2^551290861 is an apocalyptic number.

It is an amenable number.

551290861 is a deficient number, since it is larger than the sum of its proper divisors (66372083).

551290861 is a wasteful number, since it uses less digits than its factorization.

551290861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354571.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 551290861 is about 23479.5839188006. The cubic root of 551290861 is about 819.9617575859.

The spelling of 551290861 in words is "five hundred fifty-one million, two hundred ninety thousand, eight hundred sixty-one".