215889072106 has 16 divisors (see below), whose sum is σ = 326766328200. Its totient is φ = 106967354368.

The previous prime is 215889072037. The next prime is 215889072109. The reversal of 215889072106 is 601270988512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47629134081 + 168259938025 = 218241^2 + 410195^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215889072106.

It is not an unprimeable number, because it can be changed into a prime (215889072109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036680 + ... + 1227388.

Almost surely, 2^215889072106 is an apocalyptic number.

215889072106 is a deficient number, since it is larger than the sum of its proper divisors (110877256094).

215889072106 is a wasteful number, since it uses less digits than its factorization.

215889072106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195833.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 215889072106 in words is "two hundred fifteen billion, eight hundred eighty-nine million, seventy-two thousand, one hundred six".