22656505 has 16 divisors (see below), whose sum is σ = 28214784. Its totient is φ = 17447040.

The previous prime is 22656503. The next prime is 22656521. The reversal of 22656505 is 50565622.

It is not a de Polignac number, because 22656505 - 2¹ = 22656503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22656503) 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, 48282 + ... + 48748.

It is an arithmetic number, because the mean of its divisors is an integer number (1763424).

Almost surely, 2^22656505 is an apocalyptic number.

It is an amenable number.

22656505 is a deficient number, since it is larger than the sum of its proper divisors (5558279).

22656505 is a wasteful number, since it uses less digits than its factorization.

22656505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 22656505 is about 4759.8849776019. The cubic root of 22656505 is about 282.9638605851.

The spelling of 22656505 in words is "twenty-two million, six hundred fifty-six thousand, five hundred five".