215107609871 has 32 divisors (see below), whose sum is σ = 282323155968. Its totient is φ = 158909667840.

The previous prime is 215107609853. The next prime is 215107609909. The reversal of 215107609871 is 178906701512.

It is not a de Polignac number, because 215107609871 - 2¹⁸ = 215107347727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215107609841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337316 + ... + 737561.

It is an arithmetic number, because the mean of its divisors is an integer number (8822598624).

Almost surely, 2^215107609871 is an apocalyptic number.

215107609871 is a deficient number, since it is larger than the sum of its proper divisors (67215546097).

215107609871 is a wasteful number, since it uses less digits than its factorization.

215107609871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075031.

The product of its (nonzero) digits is 211680, while the sum is 47.

The spelling of 215107609871 in words is "two hundred fifteen billion, one hundred seven million, six hundred nine thousand, eight hundred seventy-one".