221444255224451 has 8 divisors (see below), whose sum is σ = 253144934964480. Its totient is φ = 189760022018568.

The previous prime is 221444255224433. The next prime is 221444255224459. The reversal of 221444255224451 is 154422552444122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221444255224451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221444255224396 and 221444255224405.

It is not an unprimeable number, because it can be changed into a prime (221444255224459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4111604681 + ... + 4111658538.

It is an arithmetic number, because the mean of its divisors is an integer number (31643116870560).

Almost surely, 2^{221444255224451} is an apocalyptic number.

221444255224451 is a deficient number, since it is larger than the sum of its proper divisors (31700679740029).

221444255224451 is an equidigital number, since it uses as much as digits as its factorization.

221444255224451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8223267073.

The product of its digits is 4096000, while the sum is 47.

The spelling of 221444255224451 in words is "two hundred twenty-one trillion, four hundred forty-four billion, two hundred fifty-five million, two hundred twenty-four thousand, four hundred fifty-one".