22478243 has 2 divisors, whose sum is σ = 22478244. Its totient is φ = 22478242.

The previous prime is 22478227. The next prime is 22478249. The reversal of 22478243 is 34287422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22478243 - 2⁴ = 22478227 is a prime.

It is not a weakly prime, because it can be changed into another prime (22478249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11239121 + 11239122.

It is an arithmetic number, because the mean of its divisors is an integer number (11239122).

Almost surely, 2^22478243 is an apocalyptic number.

22478243 is a deficient number, since it is larger than the sum of its proper divisors (1).

22478243 is an equidigital number, since it uses as much as digits as its factorization.

22478243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 32.

The square root of 22478243 is about 4741.1225464019. The cubic root of 22478243 is about 282.2197832253.

The spelling of 22478243 in words is "twenty-two million, four hundred seventy-eight thousand, two hundred forty-three".