215140135055 has 16 divisors (see below), whose sum is σ = 258980246784. Its totient is φ = 171571572480.

The previous prime is 215140134973. The next prime is 215140135079. The reversal of 215140135055 is 550531041512.

It is not a de Polignac number, because 215140135055 - 2¹⁴ = 215140118671 is a prime.

It is a super-2 number, since 2×215140135055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986434 + ... + 2091936.

It is an arithmetic number, because the mean of its divisors is an integer number (16186265424).

Almost surely, 2^215140135055 is an apocalyptic number.

215140135055 is a deficient number, since it is larger than the sum of its proper divisors (43840111729).

215140135055 is a wasteful number, since it uses less digits than its factorization.

215140135055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106786.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 215140135055 its reverse (550531041512), we get a palindrome (765671176567).

The spelling of 215140135055 in words is "two hundred fifteen billion, one hundred forty million, one hundred thirty-five thousand, fifty-five".