1213432315 has 4 divisors (see below), whose sum is σ = 1456118784. Its totient is φ = 970745848.

The previous prime is 1213432303. The next prime is 1213432343. The reversal of 1213432315 is 5132343121.

It is a happy number.

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 1213432315 - 2⁹ = 1213431803 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 1213432315.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121343227 + ... + 121343236.

It is an arithmetic number, because the mean of its divisors is an integer number (364029696).

Almost surely, 2^1213432315 is an apocalyptic number.

1213432315 is a deficient number, since it is larger than the sum of its proper divisors (242686469).

1213432315 is an equidigital number, since it uses as much as digits as its factorization.

1213432315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242686468.

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

The square root of 1213432315 is about 34834.3553837300. The cubic root of 1213432315 is about 1066.6088565132.

Adding to 1213432315 its reverse (5132343121), we get a palindrome (6345775436).

The spelling of 1213432315 in words is "one billion, two hundred thirteen million, four hundred thirty-two thousand, three hundred fifteen".