22406505 has 32 divisors (see below), whose sum is σ = 39346560. Its totient is φ = 10798080.

The previous prime is 22406479. The next prime is 22406509. The reversal of 22406505 is 50560422.

It is not a de Polignac number, because 22406505 - 2⁹ = 22405993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22406509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37489 + ... + 38081.

It is an arithmetic number, because the mean of its divisors is an integer number (1229580).

Almost surely, 2^22406505 is an apocalyptic number.

It is an amenable number.

22406505 is a deficient number, since it is larger than the sum of its proper divisors (16940055).

22406505 is a wasteful number, since it uses less digits than its factorization.

22406505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 22406505 is about 4733.5509926481. The cubic root of 22406505 is about 281.9192339501.

Adding to 22406505 its reverse (50560422), we get a palindrome (72966927).

The spelling of 22406505 in words is "twenty-two million, four hundred six thousand, five hundred five".