222440623 has 2 divisors, whose sum is σ = 222440624. Its totient is φ = 222440622.

The previous prime is 222440611. The next prime is 222440639. The reversal of 222440623 is 326044222.

222440623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222440623 is a prime.

It is equal to p_12249520 and since 222440623 and 12249520 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222440653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111220311 + 111220312.

It is an arithmetic number, because the mean of its divisors is an integer number (111220312).

Almost surely, 2^222440623 is an apocalyptic number.

222440623 is a deficient number, since it is larger than the sum of its proper divisors (1).

222440623 is an equidigital number, since it uses as much as digits as its factorization.

222440623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 222440623 is about 14914.4434358108. The cubic root of 222440623 is about 605.9052295823.

Adding to 222440623 its reverse (326044222), we get a palindrome (548484845).

The spelling of 222440623 in words is "two hundred twenty-two million, four hundred forty thousand, six hundred twenty-three".