215672 has 8 divisors (see below), whose sum is σ = 404400. Its totient is φ = 107832.

The previous prime is 215659. The next prime is 215681. The reversal of 215672 is 276512.

215672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×215672³ = 30095568525433344, which contains 333 as substring.

It is an Ulam number.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

215672 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 as a sum of consecutive naturals, namely, 13472 + ... + 13487.

It is an arithmetic number, because the mean of its divisors is an integer number (50550).

2²¹⁵⁶⁷² is an apocalyptic number.

It is an amenable number.

215672 is a deficient number, since it is larger than the sum of its proper divisors (188728).

215672 is a wasteful number, since it uses less digits than its factorization.

215672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26965 (or 26961 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 215672 is about 464.4049956665. The cubic root of 215672 is about 59.9696142440.

It can be divided in two parts, 21567 and 2, that multiplied together give a palindrome (43134).

The spelling of 215672 in words is "two hundred fifteen thousand, six hundred seventy-two".