31232220223 has 4 divisors (see below), whose sum is σ = 31431151720. Its totient is φ = 31033288728.

The previous prime is 31232220221. The next prime is 31232220241. The reversal of 31232220223 is 32202223213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32202223213 = 661 ⋅48717433.

It is a cyclic number.

It is not a de Polignac number, because 31232220223 - 2¹ = 31232220221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31232220194 and 31232220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232220221) 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, 99465513 + ... + 99465826.

It is an arithmetic number, because the mean of its divisors is an integer number (7857787930).

Almost surely, 2^31232220223 is an apocalyptic number.

31232220223 is a deficient number, since it is larger than the sum of its proper divisors (198931497).

31232220223 is a wasteful number, since it uses less digits than its factorization.

31232220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198931496.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31232220223 its reverse (32202223213), we get a palindrome (63434443436).

The spelling of 31232220223 in words is "thirty-one billion, two hundred thirty-two million, two hundred twenty thousand, two hundred twenty-three".