31314223 has 6 divisors (see below), whose sum is σ = 33049464. Its totient is φ = 29665764.

The previous prime is 31314197. The next prime is 31314251. The reversal of 31314223 is 32241313.

It is not a de Polignac number, because 31314223 - 2¹³ = 31306031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 31314223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31314253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43011 + ... + 43732.

It is an arithmetic number, because the mean of its divisors is an integer number (5508244).

Almost surely, 2^31314223 is an apocalyptic number.

31314223 is a deficient number, since it is larger than the sum of its proper divisors (1735241).

31314223 is an equidigital number, since it uses as much as digits as its factorization.

31314223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86781 (or 86762 counting only the distinct ones).

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

The square root of 31314223 is about 5595.9112752080. The cubic root of 31314223 is about 315.1958905850.

Adding to 31314223 its reverse (32241313), we get a palindrome (63555536).

The spelling of 31314223 in words is "thirty-one million, three hundred fourteen thousand, two hundred twenty-three".