31222323 has 12 divisors (see below), whose sum is σ = 49198968. Its totient is φ = 18922560.

The previous prime is 31222271. The next prime is 31222327. The reversal of 31222323 is 32322213.

It is a happy number.

It is not a de Polignac number, because 31222323 - 2¹⁴ = 31205939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31222296 and 31222305.

It is not an unprimeable number, because it can be changed into a prime (31222327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157590 + ... + 157787.

It is an arithmetic number, because the mean of its divisors is an integer number (4099914).

Almost surely, 2^31222323 is an apocalyptic number.

31222323 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31222323 is a deficient number, since it is larger than the sum of its proper divisors (17976645).

31222323 is a wasteful number, since it uses less digits than its factorization.

31222323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315394 (or 315391 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 31222323 is about 5587.6938892534. The cubic root of 31222323 is about 314.8872461148.

Adding to 31222323 its reverse (32322213), we get a palindrome (63544536).

It can be divided in two parts, 3122 and 2323, that added together give a palindrome (5445).

The spelling of 31222323 in words is "thirty-one million, two hundred twenty-two thousand, three hundred twenty-three".