31214213 has 2 divisors, whose sum is σ = 31214214. Its totient is φ = 31214212.

The previous prime is 31214201. The next prime is 31214219. The reversal of 31214213 is 31241213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 14876449 = 4042^2 + 3857^2 .

It is a cyclic number.

It is not a de Polignac number, because 31214213 - 2⁶ = 31214149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31214191 and 31214200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31214219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15607106 + 15607107.

It is an arithmetic number, because the mean of its divisors is an integer number (15607107).

Almost surely, 2^31214213 is an apocalyptic number.

It is an amenable number.

31214213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31214213 is an equidigital number, since it uses as much as digits as its factorization.

31214213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 31214213 is about 5586.9681402349. The cubic root of 31214213 is about 314.8599797611.

Adding to 31214213 its reverse (31241213), we get a palindrome (62455426).

Subtracting 31214213 from its reverse (31241213), we obtain a cube (27000 = 30³).

The spelling of 31214213 in words is "thirty-one million, two hundred fourteen thousand, two hundred thirteen".