31032212223 has 4 divisors (see below), whose sum is σ = 41376282968. Its totient is φ = 20688141480.

The previous prime is 31032212203. The next prime is 31032212279. The reversal of 31032212223 is 32221223013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31032212223 - 2¹² = 31032208127 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 31032212223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032212203) 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, 5172035368 + ... + 5172035373.

It is an arithmetic number, because the mean of its divisors is an integer number (10344070742).

Almost surely, 2^31032212223 is an apocalyptic number.

31032212223 is a deficient number, since it is larger than the sum of its proper divisors (10344070745).

31032212223 is a wasteful number, since it uses less digits than its factorization.

31032212223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344070744.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31032212223 its reverse (32221223013), we get a palindrome (63253435236).

The spelling of 31032212223 in words is "thirty-one billion, thirty-two million, two hundred twelve thousand, two hundred twenty-three".