551531551 has 2 divisors, whose sum is σ = 551531552. Its totient is φ = 551531550.

The previous prime is 551531537. The next prime is 551531573. The reversal of 551531551 is 155135155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551531551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551531521) 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, 275765775 + 275765776.

It is an arithmetic number, because the mean of its divisors is an integer number (275765776).

Almost surely, 2^551531551 is an apocalyptic number.

551531551 is a deficient number, since it is larger than the sum of its proper divisors (1).

551531551 is an equidigital number, since it uses as much as digits as its factorization.

551531551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9375, while the sum is 31.

The square root of 551531551 is about 23484.7088762028. The cubic root of 551531551 is about 820.0810702119.

The spelling of 551531551 in words is "five hundred fifty-one million, five hundred thirty-one thousand, five hundred fifty-one".