22742151 has 4 divisors (see below), whose sum is σ = 30322872. Its totient is φ = 15161432.

The previous prime is 22742149. The next prime is 22742191. The reversal of 22742151 is 15124722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22742151 - 2¹ = 22742149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742131) 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 3 ways as a sum of consecutive naturals, for example, 3790356 + ... + 3790361.

It is an arithmetic number, because the mean of its divisors is an integer number (7580718).

Almost surely, 2^22742151 is an apocalyptic number.

22742151 is a deficient number, since it is larger than the sum of its proper divisors (7580721).

22742151 is an equidigital number, since it uses as much as digits as its factorization.

22742151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7580720.

The product of its digits is 1120, while the sum is 24.

The square root of 22742151 is about 4768.8731373355. The cubic root of 22742151 is about 283.3199650748.

Adding to 22742151 its reverse (15124722), we get a palindrome (37866873).

The spelling of 22742151 in words is "twenty-two million, seven hundred forty-two thousand, one hundred fifty-one".