31652213 has 2 divisors, whose sum is σ = 31652214. Its totient is φ = 31652212.

The previous prime is 31652191. The next prime is 31652221. The reversal of 31652213 is 31225613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30217009 + 1435204 = 5497^2 + 1198^2 .

It is an emirp because it is prime and its reverse (31225613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31652213 - 2⁶ = 31652149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31652263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15826106 + 15826107.

It is an arithmetic number, because the mean of its divisors is an integer number (15826107).

Almost surely, 2^31652213 is an apocalyptic number.

It is an amenable number.

31652213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31652213 is an equidigital number, since it uses as much as digits as its factorization.

31652213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 31652213 is about 5626.0299501513. The cubic root of 31652213 is about 316.3258569145.

Adding to 31652213 its reverse (31225613), we get a palindrome (62877826).

The spelling of 31652213 in words is "thirty-one million, six hundred fifty-two thousand, two hundred thirteen".