22115399 has 4 divisors (see below), whose sum is σ = 22289664. Its totient is φ = 21941136.

The previous prime is 22115393. The next prime is 22115413. The reversal of 22115399 is 99351122.

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 22115399 - 2⁸ = 22115143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86942 + ... + 87195.

It is an arithmetic number, because the mean of its divisors is an integer number (5572416).

Almost surely, 2^22115399 is an apocalyptic number.

22115399 is a deficient number, since it is larger than the sum of its proper divisors (174265).

22115399 is a wasteful number, since it uses less digits than its factorization.

22115399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174264.

The product of its digits is 4860, while the sum is 32.

The square root of 22115399 is about 4702.7012450293. The cubic root of 22115399 is about 280.6930070147.

The spelling of 22115399 in words is "twenty-two million, one hundred fifteen thousand, three hundred ninety-nine".