215634656241 has 12 divisors (see below), whose sum is σ = 313745803332. Its totient is φ = 142707119616.

The previous prime is 215634656203. The next prime is 215634656267. The reversal of 215634656241 is 142656436512.

215634656241 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 3 + 46 + 562 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 166574178225 + 49060478016 = 408135^2 + 221496^2 .

It is not a de Polignac number, because 215634656241 - 2⁶ = 215634656177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215634654241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87441856 + ... + 87444321.

It is an arithmetic number, because the mean of its divisors is an integer number (26145483611).

Almost surely, 2^215634656241 is an apocalyptic number.

It is an amenable number.

215634656241 is a deficient number, since it is larger than the sum of its proper divisors (98111147091).

215634656241 is a wasteful number, since it uses less digits than its factorization.

215634656241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174886320 (or 174886317 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 215634656241 in words is "two hundred fifteen billion, six hundred thirty-four million, six hundred fifty-six thousand, two hundred forty-one".