31322100223 has 4 divisors (see below), whose sum is σ = 31324288720. Its totient is φ = 31319911728.

The previous prime is 31322100197. The next prime is 31322100317. The reversal of 31322100223 is 32200122313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32200122313 = 31 ⋅1038713623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31322100223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31322100223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322100023) 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, 1072638 + ... + 1101451.

It is an arithmetic number, because the mean of its divisors is an integer number (7831072180).

Almost surely, 2^31322100223 is an apocalyptic number.

31322100223 is a deficient number, since it is larger than the sum of its proper divisors (2188497).

31322100223 is a wasteful number, since it uses less digits than its factorization.

31322100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188496.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31322100223 its reverse (32200122313), we get a palindrome (63522222536).

The spelling of 31322100223 in words is "thirty-one billion, three hundred twenty-two million, one hundred thousand, two hundred twenty-three".