551021051 has 32 divisors (see below), whose sum is σ = 702535680. Its totient is φ = 421065216.

The previous prime is 551021047. The next prime is 551021069. The reversal of 551021051 is 150120155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 551021051 - 2² = 551021047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297410 + ... + 299256.

It is an arithmetic number, because the mean of its divisors is an integer number (21954240).

Almost surely, 2^551021051 is an apocalyptic number.

551021051 is a deficient number, since it is larger than the sum of its proper divisors (151514629).

551021051 is a wasteful number, since it uses less digits than its factorization.

551021051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 551021051 is about 23473.8375857038. The cubic root of 551021051 is about 819.8279685712.

The spelling of 551021051 in words is "five hundred fifty-one million, twenty-one thousand, fifty-one".