31132021223 has 8 divisors (see below), whose sum is σ = 31996766688. Its totient is φ = 30268504224.

The previous prime is 31132021201. The next prime is 31132021229. The reversal of 31132021223 is 32212023113.

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-31132021223 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 31132021195 and 31132021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132021229) 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, 255611 + ... + 357212.

It is an arithmetic number, because the mean of its divisors is an integer number (3999595836).

Almost surely, 2^31132021223 is an apocalyptic number.

31132021223 is a deficient number, since it is larger than the sum of its proper divisors (864745465).

31132021223 is a wasteful number, since it uses less digits than its factorization.

31132021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614233.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31132021223 its reverse (32212023113), we get a palindrome (63344044336).

The spelling of 31132021223 in words is "thirty-one billion, one hundred thirty-two million, twenty-one thousand, two hundred twenty-three".