215494 has 4 divisors (see below), whose sum is σ = 323244. Its totient is φ = 107746.

The previous prime is 215483. The next prime is 215497. The reversal of 215494 is 494512.

215494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215497) by changing a digit.

215494 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, 53872 + ... + 53875.

It is an arithmetic number, because the mean of its divisors is an integer number (80811).

2²¹⁵⁴⁹⁴ is an apocalyptic number.

215494 is a deficient number, since it is larger than the sum of its proper divisors (107750).

215494 is a wasteful number, since it uses less digits than its factorization.

215494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107749.

The product of its digits is 1440, while the sum is 25.

The square root of 215494 is about 464.2133130362. The cubic root of 215494 is about 59.9531115155.

The spelling of 215494 in words is "two hundred fifteen thousand, four hundred ninety-four".