551398231 has 4 divisors (see below), whose sum is σ = 551448000. Its totient is φ = 551348464.

The previous prime is 551398201. The next prime is 551398241. The reversal of 551398231 is 132893155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132893155 = 5 ⋅26578631.

It is a cyclic number.

It is not a de Polignac number, because 551398231 - 2⁷ = 551398103 is a prime.

It is a super-2 number, since 2×551398231² = 608080018299858722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551398201) by changing a digit.

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, 90 + ... + 33208.

It is an arithmetic number, because the mean of its divisors is an integer number (137862000).

Almost surely, 2^551398231 is an apocalyptic number.

551398231 is a deficient number, since it is larger than the sum of its proper divisors (49769).

551398231 is a wasteful number, since it uses less digits than its factorization.

551398231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49768.

The product of its digits is 32400, while the sum is 37.

The square root of 551398231 is about 23481.8702619702. The cubic root of 551398231 is about 820.0149863412.

The spelling of 551398231 in words is "five hundred fifty-one million, three hundred ninety-eight thousand, two hundred thirty-one".