215531242225255 has 16 divisors (see below), whose sum is σ = 282150280548864. Its totient is φ = 156749832830880.

The previous prime is 215531242225183. The next prime is 215531242225297. The reversal of 215531242225255 is 552522242135512.

It is a happy number.

It is not a de Polignac number, because 215531242225255 - 2⁴¹ = 213332218969703 is a prime.

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, 88016662 + ... + 90432268.

It is an arithmetic number, because the mean of its divisors is an integer number (17634392534304).

Almost surely, 2^{215531242225255} is an apocalyptic number.

215531242225255 is a deficient number, since it is larger than the sum of its proper divisors (66619038323609).

215531242225255 is a wasteful number, since it uses less digits than its factorization.

215531242225255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037886.

The product of its digits is 2400000, while the sum is 46.

The spelling of 215531242225255 in words is "two hundred fifteen trillion, five hundred thirty-one billion, two hundred forty-two million, two hundred twenty-five thousand, two hundred fifty-five".