22742157 has 8 divisors (see below), whose sum is σ = 30403584. Its totient is φ = 15121088.

The previous prime is 22742149. The next prime is 22742191. The reversal of 22742157 is 75124722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22742157 - 2³ = 22742149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8748 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (3800448).

Almost surely, 2^22742157 is an apocalyptic number.

It is an amenable number.

22742157 is a deficient number, since it is larger than the sum of its proper divisors (7661427).

22742157 is a wasteful number, since it uses less digits than its factorization.

22742157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20179.

The product of its digits is 7840, while the sum is 30.

The square root of 22742157 is about 4768.8737664149. The cubic root of 22742157 is about 283.3199899906.

Adding to 22742157 its reverse (75124722), we get a palindrome (97866879).

The spelling of 22742157 in words is "twenty-two million, seven hundred forty-two thousand, one hundred fifty-seven".