31314213 has 12 divisors (see below), whose sum is σ = 51693408. Its totient is φ = 17893800.

The previous prime is 31314197. The next prime is 31314251. The reversal of 31314213 is 31241313.

It is not a de Polignac number, because 31314213 - 2⁴ = 31314197 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 248463 + ... + 248588.

It is an arithmetic number, because the mean of its divisors is an integer number (4307784).

Almost surely, 2^31314213 is an apocalyptic number.

It is an amenable number.

31314213 is a deficient number, since it is larger than the sum of its proper divisors (20379195).

31314213 is a wasteful number, since it uses less digits than its factorization.

31314213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497064 (or 497061 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31314213 is about 5595.9103816984. The cubic root of 31314213 is about 315.1958570330.

Adding to 31314213 its reverse (31241313), we get a palindrome (62555526).

Subtracting from 31314213 its reverse (31241313), we obtain a square (72900 = 270²).

The spelling of 31314213 in words is "thirty-one million, three hundred fourteen thousand, two hundred thirteen".