215862 has 8 divisors (see below), whose sum is σ = 431736. Its totient is φ = 71952.

The previous prime is 215857. The next prime is 215863. The reversal of 215862 is 268512.

215862 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

215862 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215862.

It is not an unprimeable number, because it can be changed into a prime (215863) by changing a digit.

215862 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, 17983 + ... + 17994.

It is an arithmetic number, because the mean of its divisors is an integer number (53967).

2²¹⁵⁸⁶² is an apocalyptic number.

215862 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215862 is a wasteful number, since it uses less digits than its factorization.

215862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35982.

The product of its digits is 960, while the sum is 24.

The square root of 215862 is about 464.6095134626. The cubic root of 215862 is about 59.9872195001.

Subtracting 215862 from its reverse (268512), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 215862 in words is "two hundred fifteen thousand, eight hundred sixty-two".