213417985655 has 24 divisors (see below), whose sum is σ = 301261466160. Its totient is φ = 144699434880.

The previous prime is 213417985603. The next prime is 213417985687. The reversal of 213417985655 is 556589714312.

It is not a de Polignac number, because 213417985655 - 2²⁴ = 213401208439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213417985655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4871981 + ... + 4915590.

It is an arithmetic number, because the mean of its divisors is an integer number (12552561090).

Almost surely, 2^213417985655 is an apocalyptic number.

213417985655 is a deficient number, since it is larger than the sum of its proper divisors (87843480505).

213417985655 is an equidigital number, since it uses as much as digits as its factorization.

213417985655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787679 (or 9787672 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 56.

The spelling of 213417985655 in words is "two hundred thirteen billion, four hundred seventeen million, nine hundred eighty-five thousand, six hundred fifty-five".