31213311044441 has 4 divisors (see below), whose sum is σ = 31350814617552. Its totient is φ = 31075807471332.

The previous prime is 31213311044411. The next prime is 31213311044497. The reversal of 31213311044441 is 14444011331213.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213311044441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31213311044398 and 31213311044407.

It is not an unprimeable number, because it can be changed into a prime (31213311044411) 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, 68751786215 + ... + 68751786668.

It is an arithmetic number, because the mean of its divisors is an integer number (7837703654388).

Almost surely, 2^{31213311044441} is an apocalyptic number.

It is an amenable number.

31213311044441 is a deficient number, since it is larger than the sum of its proper divisors (137503573111).

31213311044441 is a wasteful number, since it uses less digits than its factorization.

31213311044441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137503573110.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 31213311044441 its reverse (14444011331213), we get a palindrome (45657322375654).

The spelling of 31213311044441 in words is "thirty-one trillion, two hundred thirteen billion, three hundred eleven million, forty-four thousand, four hundred forty-one".