551323331 has 16 divisors (see below), whose sum is σ = 608126400. Its totient is φ = 496679040.

The previous prime is 551323319. The next prime is 551323343. The reversal of 551323331 is 133323155.

It is an interprime number because it is at equal distance from previous prime (551323319) and next prime (551323343).

It is not a de Polignac number, because 551323331 - 2¹⁴ = 551306947 is a prime.

It is a super-2 number, since 2×551323331² = 607914830609871122, which contains 22 as substring.

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 551323331.

It is not an unprimeable number, because it can be changed into a prime (551323391) 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 15 ways as a sum of consecutive naturals, for example, 135101 + ... + 139121.

It is an arithmetic number, because the mean of its divisors is an integer number (38007900).

Almost surely, 2^551323331 is an apocalyptic number.

551323331 is a deficient number, since it is larger than the sum of its proper divisors (56803069).

551323331 is a wasteful number, since it uses less digits than its factorization.

551323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its digits is 4050, while the sum is 26.

The square root of 551323331 is about 23480.2753603956. The cubic root of 551323331 is about 819.9778553409.

Adding to 551323331 its reverse (133323155), we get a palindrome (684646486).

The spelling of 551323331 in words is "five hundred fifty-one million, three hundred twenty-three thousand, three hundred thirty-one".