22220623 has 2 divisors, whose sum is σ = 22220624. Its totient is φ = 22220622.

The previous prime is 22220603. The next prime is 22220629. The reversal of 22220623 is 32602222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22220623 - 2¹³ = 22212431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22220623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110311 + 11110312.

It is an arithmetic number, because the mean of its divisors is an integer number (11110312).

Almost surely, 2^22220623 is an apocalyptic number.

22220623 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220623 is an equidigital number, since it uses as much as digits as its factorization.

22220623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22220623 is about 4713.8755817268. The cubic root of 22220623 is about 281.1374774242.

Adding to 22220623 its reverse (32602222), we get a palindrome (54822845).

The spelling of 22220623 in words is "twenty-two million, two hundred twenty thousand, six hundred twenty-three".