38442221173 has 2 divisors, whose sum is σ = 38442221174. Its totient is φ = 38442221172.

The previous prime is 38442221123. The next prime is 38442221231. The reversal of 38442221173 is 37112224483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38156543569 + 285677604 = 195337^2 + 16902^2 .

It is a cyclic number.

It is not a de Polignac number, because 38442221173 - 2²⁵ = 38408666741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38442221123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19221110586 + 19221110587.

It is an arithmetic number, because the mean of its divisors is an integer number (19221110587).

Almost surely, 2^38442221173 is an apocalyptic number.

It is an amenable number.

38442221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

38442221173 is an equidigital number, since it uses as much as digits as its factorization.

38442221173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The spelling of 38442221173 in words is "thirty-eight billion, four hundred forty-two million, two hundred twenty-one thousand, one hundred seventy-three".