1233145213 has 4 divisors (see below), whose sum is σ = 1266473500. Its totient is φ = 1199816928.

The previous prime is 1233145169. The next prime is 1233145229. The reversal of 1233145213 is 3125413321.

It is a happy number.

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 1016525689 + 216619524 = 31883^2 + 14718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233145213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233145513) 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, 16664088 + ... + 16664161.

It is an arithmetic number, because the mean of its divisors is an integer number (316618375).

Almost surely, 2^1233145213 is an apocalyptic number.

It is an amenable number.

1233145213 is a deficient number, since it is larger than the sum of its proper divisors (33328287).

1233145213 is an equidigital number, since it uses as much as digits as its factorization.

1233145213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328286.

The product of its digits is 2160, while the sum is 25.

The square root of 1233145213 is about 35116.1674019247. The cubic root of 1233145213 is about 1072.3537473878.

Adding to 1233145213 its reverse (3125413321), we get a palindrome (4358558534).

The spelling of 1233145213 in words is "one billion, two hundred thirty-three million, one hundred forty-five thousand, two hundred thirteen".