1213613345 has 32 divisors (see below), whose sum is σ = 1715074560. Its totient is φ = 807206400.

The previous prime is 1213613339. The next prime is 1213613347. The reversal of 1213613345 is 5433163121.

1213613345 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1213613345 - 2⁴ = 1213613329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213613347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161420 + ... + 168770.

It is an arithmetic number, because the mean of its divisors is an integer number (53596080).

Almost surely, 2^1213613345 is an apocalyptic number.

It is an amenable number.

1213613345 is a deficient number, since it is larger than the sum of its proper divisors (501461215).

1213613345 is an equidigital number, since it uses as much as digits as its factorization.

1213613345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7505.

The product of its digits is 6480, while the sum is 29.

The square root of 1213613345 is about 34836.9537273281. The cubic root of 1213613345 is about 1066.6618957577.

Adding to 1213613345 its reverse (5433163121), we get a palindrome (6646776466).

The spelling of 1213613345 in words is "one billion, two hundred thirteen million, six hundred thirteen thousand, three hundred forty-five".