215153135 has 4 divisors (see below), whose sum is σ = 258183768. Its totient is φ = 172122504.

The previous prime is 215153111. The next prime is 215153143. The reversal of 215153135 is 531351512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 215153135 - 2²⁶ = 148044271 is a prime.

It is a super-3 number, since 3×215153135³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21515309 + ... + 21515318.

It is an arithmetic number, because the mean of its divisors is an integer number (64545942).

Almost surely, 2^215153135 is an apocalyptic number.

215153135 is a deficient number, since it is larger than the sum of its proper divisors (43030633).

215153135 is an equidigital number, since it uses as much as digits as its factorization.

215153135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43030632.

The product of its digits is 2250, while the sum is 26.

The square root of 215153135 is about 14668.0992292798. The cubic root of 215153135 is about 599.2148387252.

The spelling of 215153135 in words is "two hundred fifteen million, one hundred fifty-three thousand, one hundred thirty-five".