1393131222013 has 4 divisors (see below), whose sum is σ = 1427110032348. Its totient is φ = 1359152411680.

The previous prime is 1393131221873. The next prime is 1393131222017. The reversal of 1393131222013 is 3102221313931.

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 169589946969 + 1223541275044 = 411813^2 + 1106138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393131222013 - 2⁹ = 1393131221501 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 (1393131222017) 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, 16989405106 + ... + 16989405187.

It is an arithmetic number, because the mean of its divisors is an integer number (356777508087).

Almost surely, 2^{1393131222013} is an apocalyptic number.

It is an amenable number.

1393131222013 is a deficient number, since it is larger than the sum of its proper divisors (33978810335).

1393131222013 is an equidigital number, since it uses as much as digits as its factorization.

1393131222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33978810334.

The product of its (nonzero) digits is 5832, while the sum is 31.

Adding to 1393131222013 its reverse (3102221313931), we get a palindrome (4495352535944).

The spelling of 1393131222013 in words is "one trillion, three hundred ninety-three billion, one hundred thirty-one million, two hundred twenty-two thousand, thirteen".