22157623 has 2 divisors, whose sum is σ = 22157624. Its totient is φ = 22157622.

The previous prime is 22157621. The next prime is 22157659. The reversal of 22157623 is 32675122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22157623 - 2¹ = 22157621 is a prime.

Together with 22157621, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22157591 and 22157600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078811 + 11078812.

It is an arithmetic number, because the mean of its divisors is an integer number (11078812).

Almost surely, 2^22157623 is an apocalyptic number.

22157623 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157623 is an equidigital number, since it uses as much as digits as its factorization.

22157623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 22157623 is about 4707.1884389729. The cubic root of 22157623 is about 280.8715318921.

The spelling of 22157623 in words is "twenty-two million, one hundred fifty-seven thousand, six hundred twenty-three".