22742555 has 12 divisors (see below), whose sum is σ = 29998416. Its totient is φ = 16539600.

The previous prime is 22742539. The next prime is 22742557. The reversal of 22742555 is 55524722.

It is not a de Polignac number, because 22742555 - 2⁴ = 22742539 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22742557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18191 + ... + 19400.

It is an arithmetic number, because the mean of its divisors is an integer number (2499868).

Almost surely, 2^22742555 is an apocalyptic number.

22742555 is a deficient number, since it is larger than the sum of its proper divisors (7255861).

22742555 is a wasteful number, since it uses less digits than its factorization.

22742555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37618 (or 37607 counting only the distinct ones).

The product of its digits is 28000, while the sum is 32.

The square root of 22742555 is about 4768.9154951624. The cubic root of 22742555 is about 283.3216427318.

The spelling of 22742555 in words is "twenty-two million, seven hundred forty-two thousand, five hundred fifty-five".