38383884221 has 4 divisors (see below), whose sum is σ = 38392489152. Its totient is φ = 38375279292.

The previous prime is 38383884211. The next prime is 38383884239. The reversal of 38383884221 is 12248838383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12248838383 = 103 ⋅118920761.

It is a cyclic number.

It is not a de Polignac number, because 38383884221 - 2³⁴ = 21204015037 is a prime.

It is a super-2 number, since 2×38383884221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38383884221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38383884211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4295771 + ... + 4304696.

It is an arithmetic number, because the mean of its divisors is an integer number (9598122288).

Almost surely, 2^38383884221 is an apocalyptic number.

It is an amenable number.

38383884221 is a deficient number, since it is larger than the sum of its proper divisors (8604931).

38383884221 is an equidigital number, since it uses as much as digits as its factorization.

38383884221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604930.

The product of its digits is 1769472, while the sum is 50.

The spelling of 38383884221 in words is "thirty-eight billion, three hundred eighty-three million, eight hundred eighty-four thousand, two hundred twenty-one".