215250250135 has 4 divisors (see below), whose sum is σ = 258300300168. Its totient is φ = 172200200104.

The previous prime is 215250250037. The next prime is 215250250177. The reversal of 215250250135 is 531052052512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215250250135 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215250250097 and 215250250106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21525025009 + ... + 21525025018.

It is an arithmetic number, because the mean of its divisors is an integer number (64575075042).

Almost surely, 2^215250250135 is an apocalyptic number.

215250250135 is a deficient number, since it is larger than the sum of its proper divisors (43050050033).

215250250135 is an equidigital number, since it uses as much as digits as its factorization.

215250250135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43050050032.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 215250250135 in words is "two hundred fifteen billion, two hundred fifty million, two hundred fifty thousand, one hundred thirty-five".