221738041799 has 4 divisors (see below), whose sum is σ = 221819595840. Its totient is φ = 221656487760.

The previous prime is 221738041793. The next prime is 221738041853. The reversal of 221738041799 is 997140837122.

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

It is a cyclic number.

It is not a de Polignac number, because 221738041799 - 2¹⁶ = 221737976263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221738041799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221738041793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40772942 + ... + 40778379.

It is an arithmetic number, because the mean of its divisors is an integer number (55454898960).

Almost surely, 2^221738041799 is an apocalyptic number.

221738041799 is a deficient number, since it is larger than the sum of its proper divisors (81554041).

221738041799 is an equidigital number, since it uses as much as digits as its factorization.

221738041799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81554040.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 221738041799 in words is "two hundred twenty-one billion, seven hundred thirty-eight million, forty-one thousand, seven hundred ninety-nine".