31144310323221 has 8 divisors (see below), whose sum is σ = 41526128332800. Its totient is φ = 20762682931232.

The previous prime is 31144310323211. The next prime is 31144310323223. The reversal of 31144310323221 is 12232301344113.

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-31144310323221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144310323223) 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, 47272725 + ... + 47927018.

It is an arithmetic number, because the mean of its divisors is an integer number (5190766041600).

Almost surely, 2^{31144310323221} is an apocalyptic number.

It is an amenable number.

31144310323221 is a deficient number, since it is larger than the sum of its proper divisors (10381818009579).

31144310323221 is a wasteful number, since it uses less digits than its factorization.

31144310323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95308795.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31144310323221 its reverse (12232301344113), we get a palindrome (43376611667334).

The spelling of 31144310323221 in words is "thirty-one trillion, one hundred forty-four billion, three hundred ten million, three hundred twenty-three thousand, two hundred twenty-one".