31316225436413 has 4 divisors (see below), whose sum is σ = 31415014791420. Its totient is φ = 31217436081408.

The previous prime is 31316225436403. The next prime is 31316225436479. The reversal of 31316225436413 is 31463452261313.

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 6800526959524 + 24515698476889 = 2607782^2 + 4951333^2 .

It is a cyclic number.

It is not a de Polignac number, because 31316225436413 - 2²² = 31316221242109 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 (31316225436403) 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, 49394677028 + ... + 49394677661.

It is an arithmetic number, because the mean of its divisors is an integer number (7853753697855).

Almost surely, 2^{31316225436413} is an apocalyptic number.

It is an amenable number.

31316225436413 is a deficient number, since it is larger than the sum of its proper divisors (98789355007).

31316225436413 is an equidigital number, since it uses as much as digits as its factorization.

31316225436413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98789355006.

The product of its digits is 933120, while the sum is 44.

Adding to 31316225436413 its reverse (31463452261313), we get a palindrome (62779677697726).

The spelling of 31316225436413 in words is "thirty-one trillion, three hundred sixteen billion, two hundred twenty-five million, four hundred thirty-six thousand, four hundred thirteen".