38442221197 has 4 divisors (see below), whose sum is σ = 38449516860. Its totient is φ = 38434925536.

The previous prime is 38442221173. The next prime is 38442221231. The reversal of 38442221197 is 79112224483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30173774436 + 8268446761 = 173706^2 + 90931^2 .

It is a cyclic number.

It is not a de Polignac number, because 38442221197 - 2²⁷ = 38308003469 is a prime.

It is a super-2 number, since 2×38442221197² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38442221117) 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, 3639922 + ... + 3650467.

It is an arithmetic number, because the mean of its divisors is an integer number (9612379215).

Almost surely, 2^38442221197 is an apocalyptic number.

It is an amenable number.

38442221197 is a deficient number, since it is larger than the sum of its proper divisors (7295663).

38442221197 is an equidigital number, since it uses as much as digits as its factorization.

38442221197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295662.

The product of its digits is 193536, while the sum is 43.

The spelling of 38442221197 in words is "thirty-eight billion, four hundred forty-two million, two hundred twenty-one thousand, one hundred ninety-seven".