551213287 has 4 divisors (see below), whose sum is σ = 583637616. Its totient is φ = 518788960.

The previous prime is 551213261. The next prime is 551213323. The reversal of 551213287 is 782312155.

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 551213287 - 2¹¹ = 551211239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551213687) 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, 16212139 + ... + 16212172.

It is an arithmetic number, because the mean of its divisors is an integer number (145909404).

Almost surely, 2^551213287 is an apocalyptic number.

551213287 is a deficient number, since it is larger than the sum of its proper divisors (32424329).

551213287 is a wasteful number, since it uses less digits than its factorization.

551213287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424328.

The product of its digits is 16800, while the sum is 34.

The square root of 551213287 is about 23477.9319148855. The cubic root of 551213287 is about 819.9232959186.

The spelling of 551213287 in words is "five hundred fifty-one million, two hundred thirteen thousand, two hundred eighty-seven".