221859259442 has 18 divisors (see below), whose sum is σ = 337614043647. Its totient is φ = 109343926300.

The previous prime is 221859259421. The next prime is 221859259459. The reversal of 221859259442 is 244952958122.

It can be written as a sum of positive squares in only one way, i.e., 110929629721 + 110929629721 = 333061^2 + 333061^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333061.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47292317 + ... + 47297007.

Almost surely, 2^221859259442 is an apocalyptic number.

221859259442 is a deficient number, since it is larger than the sum of its proper divisors (115754784205).

221859259442 is an frugal number, since it uses more digits than its factorization.

221859259442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526 (or 4764 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 53.

The spelling of 221859259442 in words is "two hundred twenty-one billion, eight hundred fifty-nine million, two hundred fifty-nine thousand, four hundred forty-two".