551538487 has 2 divisors, whose sum is σ = 551538488. Its totient is φ = 551538486.

The previous prime is 551538461. The next prime is 551538503. The reversal of 551538487 is 784835155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551538487 - 2²³ = 543149879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551538187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275769243 + 275769244.

It is an arithmetic number, because the mean of its divisors is an integer number (275769244).

Almost surely, 2^551538487 is an apocalyptic number.

551538487 is a deficient number, since it is larger than the sum of its proper divisors (1).

551538487 is an equidigital number, since it uses as much as digits as its factorization.

551538487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 46.

The square root of 551538487 is about 23484.8565462938. The cubic root of 551538487 is about 820.0845079472.

The spelling of 551538487 in words is "five hundred fifty-one million, five hundred thirty-eight thousand, four hundred eighty-seven".