551887657 has 2 divisors, whose sum is σ = 551887658. Its totient is φ = 551887656.

The previous prime is 551887631. The next prime is 551887669. The reversal of 551887657 is 756788155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336942736 + 214944921 = 18356^2 + 14661^2 .

It is a cyclic number.

It is not a de Polignac number, because 551887657 - 2¹⁹ = 551363369 is a prime.

It is not a weakly prime, because it can be changed into another prime (551887607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275943828 + 275943829.

It is an arithmetic number, because the mean of its divisors is an integer number (275943829).

Almost surely, 2^551887657 is an apocalyptic number.

It is an amenable number.

551887657 is a deficient number, since it is larger than the sum of its proper divisors (1).

551887657 is an equidigital number, since it uses as much as digits as its factorization.

551887657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352000, while the sum is 52.

The square root of 551887657 is about 23492.2893094734. The cubic root of 551887657 is about 820.2575321380.

The spelling of 551887657 in words is "five hundred fifty-one million, eight hundred eighty-seven thousand, six hundred fifty-seven".