31244144213 has 4 divisors (see below), whose sum is σ = 31244518080. Its totient is φ = 31243770348.

The previous prime is 31244144209. The next prime is 31244144233.

31244144213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31244144213 - 2² = 31244144209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31244144233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228 + ... + 249986.

It is an arithmetic number, because the mean of its divisors is an integer number (7811129520).

Almost surely, 2^31244144213 is an apocalyptic number.

It is an amenable number.

31244144213 is a deficient number, since it is larger than the sum of its proper divisors (373867).

31244144213 is a wasteful number, since it uses less digits than its factorization.

31244144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373866.

The product of its digits is 9216, while the sum is 29.

The spelling of 31244144213 in words is "thirty-one billion, two hundred forty-four million, one hundred forty-four thousand, two hundred thirteen".