22742156 has 6 divisors (see below), whose sum is σ = 39798780. Its totient is φ = 11371076.

The previous prime is 22742149. The next prime is 22742191. The reversal of 22742156 is 65124722.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2842766 + ... + 2842773.

It is an arithmetic number, because the mean of its divisors is an integer number (6633130).

Almost surely, 2^22742156 is an apocalyptic number.

It is an amenable number.

22742156 is a deficient number, since it is larger than the sum of its proper divisors (17056624).

22742156 is a wasteful number, since it uses less digits than its factorization.

22742156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685543 (or 5685541 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 22742156 is about 4768.8736615683. The cubic root of 22742156 is about 283.3199858380.

Adding to 22742156 its reverse (65124722), we get a palindrome (87866878).

The spelling of 22742156 in words is "twenty-two million, seven hundred forty-two thousand, one hundred fifty-six".