215656322134 has 24 divisors (see below), whose sum is σ = 355854923424. Its totient is φ = 97945834800.

The previous prime is 215656322111. The next prime is 215656322137. The reversal of 215656322134 is 431223656512.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215656322137) 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, 64057 + ... + 659860.

It is an arithmetic number, because the mean of its divisors is an integer number (14827288476).

Almost surely, 2^215656322134 is an apocalyptic number.

215656322134 is a deficient number, since it is larger than the sum of its proper divisors (140198601290).

215656322134 is a wasteful number, since it uses less digits than its factorization.

215656322134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725172 (or 725161 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

Adding to 215656322134 its reverse (431223656512), we get a palindrome (646879978646).

The spelling of 215656322134 in words is "two hundred fifteen billion, six hundred fifty-six million, three hundred twenty-two thousand, one hundred thirty-four".