22415 has 4 divisors (see below), whose sum is σ = 26904. Its totient is φ = 17928.

The previous prime is 22409. The next prime is 22433. The reversal of 22415 is 51422.

22415 = T₄₇ + T₄₈ + ... + T₆₁.

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

It is a cyclic number.

It is not a de Polignac number, because 22415 - 2⁸ = 22159 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 22415.

It is a congruent number.

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, 2237 + ... + 2246.

It is an arithmetic number, because the mean of its divisors is an integer number (6726).

2²²⁴¹⁵ is an apocalyptic number.

22415 is a deficient number, since it is larger than the sum of its proper divisors (4489).

22415 is an equidigital number, since it uses as much as digits as its factorization.

22415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488.

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

The square root of 22415 is about 149.7163985674. The cubic root of 22415 is about 28.1954857553.

Adding to 22415 its reverse (51422), we get a palindrome (73837).

The spelling of 22415 in words is "twenty-two thousand, four hundred fifteen".