38165213 has 2 divisors, whose sum is σ = 38165214. Its totient is φ = 38165212.

The previous prime is 38165191. The next prime is 38165227. The reversal of 38165213 is 31256183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24423364 + 13741849 = 4942^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 38165213 - 2¹⁸ = 37903069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38165233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19082606 + 19082607.

It is an arithmetic number, because the mean of its divisors is an integer number (19082607).

Almost surely, 2^38165213 is an apocalyptic number.

It is an amenable number.

38165213 is a deficient number, since it is larger than the sum of its proper divisors (1).

38165213 is an equidigital number, since it uses as much as digits as its factorization.

38165213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 38165213 is about 6177.8000129496. The cubic root of 38165213 is about 336.6840661312.

The spelling of 38165213 in words is "thirty-eight million, one hundred sixty-five thousand, two hundred thirteen".