213517386135 has 24 divisors (see below), whose sum is σ = 389575583280. Its totient is φ = 107882468352.

The previous prime is 213517386113. The next prime is 213517386143. The reversal of 213517386135 is 531683715312.

213517386135 is a `hidden beast` number, since 2 + 13 + 5 + 17 + 3 + 8 + 613 + 5 = 666.

It is not a de Polignac number, because 213517386135 - 2²⁵ = 213483831703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 124863114 + ... + 124864823.

It is an arithmetic number, because the mean of its divisors is an integer number (16232315970).

Almost surely, 2^213517386135 is an apocalyptic number.

213517386135 is a deficient number, since it is larger than the sum of its proper divisors (176058197145).

213517386135 is a wasteful number, since it uses less digits than its factorization.

213517386135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249727967 (or 249727964 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 213517386135 in words is "two hundred thirteen billion, five hundred seventeen million, three hundred eighty-six thousand, one hundred thirty-five".