551350321 has 4 divisors (see below), whose sum is σ = 551885092. Its totient is φ = 550815552.

The previous prime is 551350309. The next prime is 551350337. The reversal of 551350321 is 123053155.

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

It can be written as a sum of positive squares in 2 ways, for example, as 327429025 + 223921296 = 18095^2 + 14964^2 .

It is a cyclic number.

It is not a de Polignac number, because 551350321 - 2⁷ = 551350193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551350351) 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 3 ways as a sum of consecutive naturals, for example, 265836 + ... + 267901.

It is an arithmetic number, because the mean of its divisors is an integer number (137971273).

Almost surely, 2^551350321 is an apocalyptic number.

It is an amenable number.

551350321 is a deficient number, since it is larger than the sum of its proper divisors (534771).

551350321 is a wasteful number, since it uses less digits than its factorization.

551350321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534770.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 551350321 is about 23480.8500910849. The cubic root of 551350321 is about 819.9912357778.

The spelling of 551350321 in words is "five hundred fifty-one million, three hundred fifty thousand, three hundred twenty-one".