551243215 has 4 divisors (see below), whose sum is σ = 661491864. Its totient is φ = 440994568.

The previous prime is 551243179. The next prime is 551243227. The reversal of 551243215 is 512342155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551243215 - 2⁷ = 551243087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55124317 + ... + 55124326.

It is an arithmetic number, because the mean of its divisors is an integer number (165372966).

Almost surely, 2^551243215 is an apocalyptic number.

551243215 is a deficient number, since it is larger than the sum of its proper divisors (110248649).

551243215 is a wasteful number, since it uses less digits than its factorization.

551243215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110248648.

The product of its digits is 6000, while the sum is 28.

The square root of 551243215 is about 23478.5692707201. The cubic root of 551243215 is about 819.9381348330.

The spelling of 551243215 in words is "five hundred fifty-one million, two hundred forty-three thousand, two hundred fifteen".