215402 has 8 divisors (see below), whose sum is σ = 352512. Its totient is φ = 97900.

The previous prime is 215399. The next prime is 215417. The reversal of 215402 is 204512.

215402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4874 + ... + 4917.

It is an arithmetic number, because the mean of its divisors is an integer number (44064).

2²¹⁵⁴⁰² is an apocalyptic number.

215402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215402 is a deficient number, since it is larger than the sum of its proper divisors (137110).

215402 is a wasteful number, since it uses less digits than its factorization.

215402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9804.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 215402 is about 464.1142100820. The cubic root of 215402 is about 59.9445784529.

Adding to 215402 its reverse (204512), we get a palindrome (419914).

The spelling of 215402 in words is "two hundred fifteen thousand, four hundred two".