221428228443467 has 16 divisors (see below), whose sum is σ = 229260288600000. Its totient is φ = 213609295011840.

The previous prime is 221428228443439. The next prime is 221428228443517. The reversal of 221428228443467 is 764344822824122.

221428228443467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221428228443467 is a prime.

It is a super-2 number, since 2×221428228443467² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221428228443407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663075803 + ... + 663409659.

It is an arithmetic number, because the mean of its divisors is an integer number (14328768037500).

Almost surely, 2^{221428228443467} is an apocalyptic number.

221428228443467 is a deficient number, since it is larger than the sum of its proper divisors (7832060156533).

221428228443467 is a wasteful number, since it uses less digits than its factorization.

221428228443467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353446.

The product of its digits is 66060288, while the sum is 59.

The spelling of 221428228443467 in words is "two hundred twenty-one trillion, four hundred twenty-eight billion, two hundred twenty-eight million, four hundred forty-three thousand, four hundred sixty-seven".