222415145 has 4 divisors (see below), whose sum is σ = 266898180. Its totient is φ = 177932112.

The previous prime is 222415133. The next prime is 222415147. The reversal of 222415145 is 541514222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111175936 + 111239209 = 10544^2 + 10547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222415145 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222415147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22241510 + ... + 22241519.

It is an arithmetic number, because the mean of its divisors is an integer number (66724545).

Almost surely, 2^222415145 is an apocalyptic number.

It is an amenable number.

222415145 is a deficient number, since it is larger than the sum of its proper divisors (44483035).

222415145 is an equidigital number, since it uses as much as digits as its factorization.

222415145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44483034.

The product of its digits is 3200, while the sum is 26.

The square root of 222415145 is about 14913.5892728746. The cubic root of 222415145 is about 605.8820955542.

Adding to 222415145 its reverse (541514222), we get a palindrome (763929367).

The spelling of 222415145 in words is "two hundred twenty-two million, four hundred fifteen thousand, one hundred forty-five".