551156939 has 2 divisors, whose sum is σ = 551156940. Its totient is φ = 551156938.

The previous prime is 551156927. The next prime is 551156987. The reversal of 551156939 is 939651155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551156939 - 2⁴ = 551156923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551156939.

It is not a weakly prime, because it can be changed into another prime (551156989) 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, 275578469 + 275578470.

It is an arithmetic number, because the mean of its divisors is an integer number (275578470).

Almost surely, 2^551156939 is an apocalyptic number.

551156939 is a deficient number, since it is larger than the sum of its proper divisors (1).

551156939 is an equidigital number, since it uses as much as digits as its factorization.

551156939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 182250, while the sum is 44.

The square root of 551156939 is about 23476.7318636986. The cubic root of 551156939 is about 819.8953559703.

The spelling of 551156939 in words is "five hundred fifty-one million, one hundred fifty-six thousand, nine hundred thirty-nine".