22155223 has 2 divisors, whose sum is σ = 22155224. Its totient is φ = 22155222.

The previous prime is 22155209. The next prime is 22155227. The reversal of 22155223 is 32255122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22155223 - 2⁹ = 22154711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22155194 and 22155203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077611 + 11077612.

It is an arithmetic number, because the mean of its divisors is an integer number (11077612).

Almost surely, 2^22155223 is an apocalyptic number.

22155223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155223 is an equidigital number, since it uses as much as digits as its factorization.

22155223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 22.

The square root of 22155223 is about 4706.9335028233. The cubic root of 22155223 is about 280.8613906717.

The spelling of 22155223 in words is "twenty-two million, one hundred fifty-five thousand, two hundred twenty-three".