551623313 has 2 divisors, whose sum is σ = 551623314. Its totient is φ = 551623312.

The previous prime is 551623243. The next prime is 551623321. The reversal of 551623313 is 313326155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481934209 + 69689104 = 21953^2 + 8348^2 .

It is a cyclic number.

It is not a de Polignac number, because 551623313 - 2⁸ = 551623057 is a prime.

It is not a weakly prime, because it can be changed into another prime (551628313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275811656 + 275811657.

It is an arithmetic number, because the mean of its divisors is an integer number (275811657).

Almost surely, 2^551623313 is an apocalyptic number.

It is an amenable number.

551623313 is a deficient number, since it is larger than the sum of its proper divisors (1).

551623313 is an equidigital number, since it uses as much as digits as its factorization.

551623313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 29.

The square root of 551623313 is about 23486.6624491433. The cubic root of 551623313 is about 820.1265484842.

Adding to 551623313 its reverse (313326155), we get a palindrome (864949468).

The spelling of 551623313 in words is "five hundred fifty-one million, six hundred twenty-three thousand, three hundred thirteen".