22742247 has 16 divisors (see below), whose sum is σ = 33706368. Its totient is φ = 13522080.

The previous prime is 22742197. The next prime is 22742273. The reversal of 22742247 is 74224722.

It is not a de Polignac number, because 22742247 - 2¹² = 22738151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4753 + ... + 8250.

It is an arithmetic number, because the mean of its divisors is an integer number (2106648).

Almost surely, 2^22742247 is an apocalyptic number.

22742247 is a deficient number, since it is larger than the sum of its proper divisors (10964121).

22742247 is a wasteful number, since it uses less digits than its factorization.

22742247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13070.

The product of its digits is 12544, while the sum is 30.

The square root of 22742247 is about 4768.8832025958. The cubic root of 22742247 is about 283.3203637277.

Adding to 22742247 its reverse (74224722), we get a palindrome (96966969).

The spelling of 22742247 in words is "twenty-two million, seven hundred forty-two thousand, two hundred forty-seven".