551430623 has 2 divisors, whose sum is σ = 551430624. Its totient is φ = 551430622.

The previous prime is 551430601. The next prime is 551430631. The reversal of 551430623 is 326034155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551430623 - 2¹² = 551426527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551430923) 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 as a sum of consecutive naturals, namely, 275715311 + 275715312.

It is an arithmetic number, because the mean of its divisors is an integer number (275715312).

Almost surely, 2^551430623 is an apocalyptic number.

551430623 is a deficient number, since it is larger than the sum of its proper divisors (1).

551430623 is an equidigital number, since it uses as much as digits as its factorization.

551430623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 551430623 is about 23482.5599754371. The cubic root of 551430623 is about 820.0310433419.

Adding to 551430623 its reverse (326034155), we get a palindrome (877464778).

The spelling of 551430623 in words is "five hundred fifty-one million, four hundred thirty thousand, six hundred twenty-three".