551322251 has 4 divisors (see below), whose sum is σ = 551814312. Its totient is φ = 550830192.

The previous prime is 551322217. The next prime is 551322263. The reversal of 551322251 is 152223155.

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 551322251 - 2¹⁰ = 551321227 is a prime.

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 551322251.

It is not an unprimeable number, because it can be changed into a prime (553322251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244346 + ... + 246591.

It is an arithmetic number, because the mean of its divisors is an integer number (137953578).

Almost surely, 2^551322251 is an apocalyptic number.

551322251 is a deficient number, since it is larger than the sum of its proper divisors (492061).

551322251 is a wasteful number, since it uses less digits than its factorization.

551322251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492060.

The product of its digits is 3000, while the sum is 26.

The square root of 551322251 is about 23480.2523623576. The cubic root of 551322251 is about 819.9773199160.

The spelling of 551322251 in words is "five hundred fifty-one million, three hundred twenty-two thousand, two hundred fifty-one".