215112 has 16 divisors (see below), whose sum is σ = 537840. Its totient is φ = 71696.

The previous prime is 215087. The next prime is 215123. The reversal of 215112 is 211512.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 8.

It is an unprimeable number.

215112 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4458 + ... + 4505.

It is an arithmetic number, because the mean of its divisors is an integer number (33615).

2²¹⁵¹¹² is an apocalyptic number.

It is an amenable number.

215112 is an abundant number, since it is smaller than the sum of its proper divisors (322728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215112 is a wasteful number, since it uses less digits than its factorization.

215112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972 (or 8968 counting only the distinct ones).

The product of its digits is 20, while the sum is 12.

The square root of 215112 is about 463.8016817563. The cubic root of 215112 is about 59.9176648448.

Adding to 215112 its reverse (211512), we get a palindrome (426624).

Subtracting from 215112 its reverse (211512), we obtain a square (3600 = 60²).

The spelling of 215112 in words is "two hundred fifteen thousand, one hundred twelve".