123215227 has 2 divisors, whose sum is σ = 123215228. Its totient is φ = 123215226.

The previous prime is 123215177. The next prime is 123215321. The reversal of 123215227 is 722512321.

It is a weak prime.

It is an emirp because it is prime and its reverse (722512321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123215227 is a prime.

It is not a weakly prime, because it can be changed into another prime (123275227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61607613 + 61607614.

It is an arithmetic number, because the mean of its divisors is an integer number (61607614).

Almost surely, 2^123215227 is an apocalyptic number.

123215227 is a deficient number, since it is larger than the sum of its proper divisors (1).

123215227 is an equidigital number, since it uses as much as digits as its factorization.

123215227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 123215227 is about 11100.2354479533. The cubic root of 123215227 is about 497.6088860428.

Adding to 123215227 its reverse (722512321), we get a palindrome (845727548).

The spelling of 123215227 in words is "one hundred twenty-three million, two hundred fifteen thousand, two hundred twenty-seven".