215902 has 4 divisors (see below), whose sum is σ = 323856. Its totient is φ = 107950.

The previous prime is 215899. The next prime is 215909. The reversal of 215902 is 209512.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×215902² = 93227347208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53974 + ... + 53977.

It is an arithmetic number, because the mean of its divisors is an integer number (80964).

2²¹⁵⁹⁰² is an apocalyptic number.

215902 is a deficient number, since it is larger than the sum of its proper divisors (107954).

215902 is a wasteful number, since it uses less digits than its factorization.

215902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107953.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 215902 is about 464.6525583702. The cubic root of 215902 is about 59.9909245533.

The spelling of 215902 in words is "two hundred fifteen thousand, nine hundred two".