551055021 has 16 divisors (see below), whose sum is σ = 806850048. Its totient is φ = 331758000.

The previous prime is 551055007. The next prime is 551055041. The reversal of 551055021 is 120550155.

551055021 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 551055021 - 2⁵ = 551054989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 551054982 and 551055000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551055041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50311 + ... + 60276.

It is an arithmetic number, because the mean of its divisors is an integer number (50428128).

Almost surely, 2^551055021 is an apocalyptic number.

It is an amenable number.

551055021 is a deficient number, since it is larger than the sum of its proper divisors (255795027).

551055021 is a wasteful number, since it uses less digits than its factorization.

551055021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110752.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 551055021 is about 23474.5611460577. The cubic root of 551055021 is about 819.8448154677.

The spelling of 551055021 in words is "five hundred fifty-one million, fifty-five thousand, twenty-one".