221954974559 has 4 divisors (see below), whose sum is σ = 229114812480. Its totient is φ = 214795136640.

The previous prime is 221954974543. The next prime is 221954974561. The reversal of 221954974559 is 955479459122.

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 221954974559 - 2⁴ = 221954974543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221954974529) 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, 3579918914 + ... + 3579918975.

It is an arithmetic number, because the mean of its divisors is an integer number (57278703120).

Almost surely, 2^221954974559 is an apocalyptic number.

221954974559 is a deficient number, since it is larger than the sum of its proper divisors (7159837921).

221954974559 is an equidigital number, since it uses as much as digits as its factorization.

221954974559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159837920.

The product of its digits is 40824000, while the sum is 62.

The spelling of 221954974559 in words is "two hundred twenty-one billion, nine hundred fifty-four million, nine hundred seventy-four thousand, five hundred fifty-nine".