31796213 has 2 divisors, whose sum is σ = 31796214. Its totient is φ = 31796212.

The previous prime is 31796201. The next prime is 31796231. The reversal of 31796213 is 31269713.

It is a happy number.

Together with next prime (31796231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31618129 + 178084 = 5623^2 + 422^2 .

It is an emirp because it is prime and its reverse (31269713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31796213 is a prime.

It is a super-2 number, since 2×31796213² = 2021998322282738, which contains 22 as substring.

It is equal to p_1961960 and since 31796213 and 1961960 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31796213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31796243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15898106 + 15898107.

It is an arithmetic number, because the mean of its divisors is an integer number (15898107).

Almost surely, 2^31796213 is an apocalyptic number.

It is an amenable number.

31796213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31796213 is an equidigital number, since it uses as much as digits as its factorization.

31796213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 31796213 is about 5638.8130843290. The cubic root of 31796213 is about 316.8048336433.

The spelling of 31796213 in words is "thirty-one million, seven hundred ninety-six thousand, two hundred thirteen".