1213225339 has 4 divisors (see below), whose sum is σ = 1213615224. Its totient is φ = 1212835456.

The previous prime is 1213225337. The next prime is 1213225379. The reversal of 1213225339 is 9335223121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213225339 - 2¹ = 1213225337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213225339.

It is not an unprimeable number, because it can be changed into a prime (1213225333) 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, 190237 + ... + 196510.

It is an arithmetic number, because the mean of its divisors is an integer number (303403806).

Almost surely, 2^1213225339 is an apocalyptic number.

1213225339 is a deficient number, since it is larger than the sum of its proper divisors (389885).

1213225339 is an equidigital number, since it uses as much as digits as its factorization.

1213225339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389884.

The product of its digits is 9720, while the sum is 31.

The square root of 1213225339 is about 34831.3843968338. The cubic root of 1213225339 is about 1066.5482089915.

The spelling of 1213225339 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, three hundred thirty-nine".