38900221 has 4 divisors (see below), whose sum is σ = 38953600. Its totient is φ = 38846844.

The previous prime is 38900219. The next prime is 38900237. The reversal of 38900221 is 12200983.

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: 12200983 = 19 ⋅642157.

It is a cyclic number.

It is not a de Polignac number, because 38900221 - 2¹ = 38900219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38900621) 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, 25581 + ... + 27058.

It is an arithmetic number, because the mean of its divisors is an integer number (9738400).

Almost surely, 2^38900221 is an apocalyptic number.

It is an amenable number.

38900221 is a deficient number, since it is larger than the sum of its proper divisors (53379).

38900221 is an equidigital number, since it uses as much as digits as its factorization.

38900221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53378.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 38900221 is about 6237.0041686694. The cubic root of 38900221 is about 338.8316907417.

The spelling of 38900221 in words is "thirty-eight million, nine hundred thousand, two hundred twenty-one".