555216887 has 2 divisors, whose sum is σ = 555216888. Its totient is φ = 555216886.

The previous prime is 555216881. The next prime is 555216899. The reversal of 555216887 is 788612555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555216887 - 2²² = 551022583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555216881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277608443 + 277608444.

It is an arithmetic number, because the mean of its divisors is an integer number (277608444).

Almost surely, 2^555216887 is an apocalyptic number.

555216887 is a deficient number, since it is larger than the sum of its proper divisors (1).

555216887 is an equidigital number, since it uses as much as digits as its factorization.

555216887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672000, while the sum is 47.

The square root of 555216887 is about 23563.0406993665. The cubic root of 555216887 is about 821.9036117919.

The spelling of 555216887 in words is "five hundred fifty-five million, two hundred sixteen thousand, eight hundred eighty-seven".