22400115 has 16 divisors (see below), whose sum is σ = 36429216. Its totient is φ = 11750400.

The previous prime is 22400111. The next prime is 22400149. The reversal of 22400115 is 51100422.

It is not a de Polignac number, because 22400115 - 2² = 22400111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 22400094 and 22400103.

It is not an unprimeable number, because it can be changed into a prime (22400111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11326 + ... + 13155.

It is an arithmetic number, because the mean of its divisors is an integer number (2276826).

Almost surely, 2^22400115 is an apocalyptic number.

22400115 is a deficient number, since it is larger than the sum of its proper divisors (14029101).

22400115 is a wasteful number, since it uses less digits than its factorization.

22400115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24550.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 22400115 is about 4732.8759755565. The cubic root of 22400115 is about 281.8924316861.

Adding to 22400115 its reverse (51100422), we get a palindrome (73500537).

The spelling of 22400115 in words is "twenty-two million, four hundred thousand, one hundred fifteen".