22653157 has 4 divisors (see below), whose sum is σ = 23383936. Its totient is φ = 21922380.

The previous prime is 22653151. The next prime is 22653167. The reversal of 22653157 is 75135622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75135622 = 2 ⋅37567811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22653157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 730747 = 22653157 / (2 + 2 + 6 + 5 + 3 + 1 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22653151) 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 3 ways as a sum of consecutive naturals, for example, 365343 + ... + 365404.

It is an arithmetic number, because the mean of its divisors is an integer number (5845984).

Almost surely, 2^22653157 is an apocalyptic number.

It is an amenable number.

22653157 is a deficient number, since it is larger than the sum of its proper divisors (730779).

22653157 is an equidigital number, since it uses as much as digits as its factorization.

22653157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730778.

The product of its digits is 12600, while the sum is 31.

The square root of 22653157 is about 4759.5332754378. The cubic root of 22653157 is about 282.9499218411.

Adding to 22653157 its reverse (75135622), we get a palindrome (97788779).

The spelling of 22653157 in words is "twenty-two million, six hundred fifty-three thousand, one hundred fifty-seven".