551215651 has 12 divisors (see below), whose sum is σ = 643663152. Its totient is φ = 470663088.

The previous prime is 551215649. The next prime is 551215661. The reversal of 551215651 is 156512155.

It is not a de Polignac number, because 551215651 - 2¹ = 551215649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551215661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8500 + ... + 34273.

It is an arithmetic number, because the mean of its divisors is an integer number (53638596).

Almost surely, 2^551215651 is an apocalyptic number.

551215651 is a deficient number, since it is larger than the sum of its proper divisors (92447501).

551215651 is a wasteful number, since it uses less digits than its factorization.

551215651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43050 (or 43043 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The square root of 551215651 is about 23477.9822599814. The cubic root of 551215651 is about 819.9244680577.

The spelling of 551215651 in words is "five hundred fifty-one million, two hundred fifteen thousand, six hundred fifty-one".