22115406 has 16 divisors (see below), whose sum is σ = 44282448. Its totient is φ = 7363200.

The previous prime is 22115393. The next prime is 22115413. The reversal of 22115406 is 60451122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5526 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (2767653).

Almost surely, 2^22115406 is an apocalyptic number.

22115406 is an abundant number, since it is smaller than the sum of its proper divisors (22167042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22115406 is a wasteful number, since it uses less digits than its factorization.

22115406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 22115406 is about 4702.7019892823. The cubic root of 22115406 is about 280.6930366298.

Adding to 22115406 its reverse (60451122), we get a palindrome (82566528).

The spelling of 22115406 in words is "twenty-two million, one hundred fifteen thousand, four hundred six".