215681105 has 16 divisors (see below), whose sum is σ = 268898304. Its totient is φ = 165896640.

The previous prime is 215681071. The next prime is 215681113. The reversal of 215681105 is 501186512.

It is not a de Polignac number, because 215681105 - 2⁸ = 215680849 is a prime.

It is a Duffinian 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, 19904 + ... + 28766.

It is an arithmetic number, because the mean of its divisors is an integer number (16806144).

Almost surely, 2^215681105 is an apocalyptic number.

It is an amenable number.

215681105 is a deficient number, since it is larger than the sum of its proper divisors (53217199).

215681105 is a wasteful number, since it uses less digits than its factorization.

215681105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9056.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 215681105 is about 14686.0854212414. The cubic root of 215681105 is about 599.7045814222.

The spelling of 215681105 in words is "two hundred fifteen million, six hundred eighty-one thousand, one hundred five".