1313220433 has 32 divisors (see below), whose sum is σ = 1566432000. Its totient is φ = 1100227968.

The previous prime is 1313220413. The next prime is 1313220449. The reversal of 1313220433 is 3340223131.

It is a de Polignac number, because none of the positive numbers 2^k-1313220433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313220413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4481835 + ... + 4482127.

It is an arithmetic number, because the mean of its divisors is an integer number (48951000).

Almost surely, 2^1313220433 is an apocalyptic number.

It is an amenable number.

1313220433 is a deficient number, since it is larger than the sum of its proper divisors (253211567).

1313220433 is an equidigital number, since it uses as much as digits as its factorization.

1313220433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1313220433 is about 36238.3834214497. The cubic root of 1313220433 is about 1095.0800753212.

Adding to 1313220433 its reverse (3340223131), we get a palindrome (4653443564).

The spelling of 1313220433 in words is "one billion, three hundred thirteen million, two hundred twenty thousand, four hundred thirty-three".