38221663 has 2 divisors, whose sum is σ = 38221664. Its totient is φ = 38221662.

The previous prime is 38221657. The next prime is 38221679. The reversal of 38221663 is 36612283.

It is a weak prime.

It is an emirp because it is prime and its reverse (36612283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38221663 - 2²¹ = 36124511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38222663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19110831 + 19110832.

It is an arithmetic number, because the mean of its divisors is an integer number (19110832).

Almost surely, 2^38221663 is an apocalyptic number.

38221663 is a deficient number, since it is larger than the sum of its proper divisors (1).

38221663 is an equidigital number, since it uses as much as digits as its factorization.

38221663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 38221663 is about 6182.3671033027. The cubic root of 38221663 is about 336.8499803347.

The spelling of 38221663 in words is "thirty-eight million, two hundred twenty-one thousand, six hundred sixty-three".