38221087 has 4 divisors (see below), whose sum is σ = 38385360. Its totient is φ = 38056816.

The previous prime is 38221067. The next prime is 38221091. The reversal of 38221087 is 78012283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78012283 = 4007 ⋅19469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38221087 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38221067) 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, 81787 + ... + 82252.

It is an arithmetic number, because the mean of its divisors is an integer number (9596340).

Almost surely, 2^38221087 is an apocalyptic number.

38221087 is a deficient number, since it is larger than the sum of its proper divisors (164273).

38221087 is a wasteful number, since it uses less digits than its factorization.

38221087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164272.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 38221087 is about 6182.3205190284. The cubic root of 38221087 is about 336.8482882179.

It can be divided in two parts, 3822 and 1087, that multiplied together give a palindrome (4154514).

The spelling of 38221087 in words is "thirty-eight million, two hundred twenty-one thousand, eighty-seven".