31221324413 has 8 divisors (see below), whose sum is σ = 31292788800. Its totient is φ = 31149929088.

The previous prime is 31221324403. The next prime is 31221324443. The reversal of 31221324413 is 31442312213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31221324413 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 (31221324403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948845 + ... + 981197.

It is an arithmetic number, because the mean of its divisors is an integer number (3911598600).

Almost surely, 2^31221324413 is an apocalyptic number.

It is an amenable number.

31221324413 is a deficient number, since it is larger than the sum of its proper divisors (71464387).

31221324413 is a wasteful number, since it uses less digits than its factorization.

31221324413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34531.

The product of its digits is 3456, while the sum is 26.

Adding to 31221324413 its reverse (31442312213), we get a palindrome (62663636626).

The spelling of 31221324413 in words is "thirty-one billion, two hundred twenty-one million, three hundred twenty-four thousand, four hundred thirteen".