138562213 has 2 divisors, whose sum is σ = 138562214. Its totient is φ = 138562212.

The previous prime is 138562201. The next prime is 138562243. The reversal of 138562213 is 312265831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112826884 + 25735329 = 10622^2 + 5073^2 .

It is an emirp because it is prime and its reverse (312265831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138562213 - 2⁵ = 138562181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138562243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69281106 + 69281107.

It is an arithmetic number, because the mean of its divisors is an integer number (69281107).

Almost surely, 2^138562213 is an apocalyptic number.

It is an amenable number.

138562213 is a deficient number, since it is larger than the sum of its proper divisors (1).

138562213 is an equidigital number, since it uses as much as digits as its factorization.

138562213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 138562213 is about 11771.2451762760. The cubic root of 138562213 is about 517.4657424015.

The spelling of 138562213 in words is "one hundred thirty-eight million, five hundred sixty-two thousand, two hundred thirteen".