221624846449 has 4 divisors (see below), whose sum is σ = 221638918464. Its totient is φ = 221610774436.

The previous prime is 221624846423. The next prime is 221624846477. The reversal of 221624846449 is 944648426122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944648426122 = 2 ⋅472324213061.

It is a cyclic number.

It is not a de Polignac number, because 221624846449 - 2¹³ = 221624838257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221624846396 and 221624846405.

It is not an unprimeable number, because it can be changed into a prime (221624844449) 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, 7012357 + ... + 7043890.

It is an arithmetic number, because the mean of its divisors is an integer number (55409729616).

Almost surely, 2^221624846449 is an apocalyptic number.

It is an amenable number.

221624846449 is a deficient number, since it is larger than the sum of its proper divisors (14072015).

221624846449 is a wasteful number, since it uses less digits than its factorization.

221624846449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072014.

The product of its digits is 5308416, while the sum is 52.

The spelling of 221624846449 in words is "two hundred twenty-one billion, six hundred twenty-four million, eight hundred forty-six thousand, four hundred forty-nine".