221422047307457 has 4 divisors (see below), whose sum is σ = 222015672099540. Its totient is φ = 220828422515376.

The previous prime is 221422047307423. The next prime is 221422047307493. The reversal of 221422047307457 is 754703740224122.

221422047307457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71674916938816 + 149747130368641 = 8466104^2 + 12237121^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422047307457 - 2²² = 221422043113153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221422047307057) 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, 296812395482 + ... + 296812396227.

It is an arithmetic number, because the mean of its divisors is an integer number (55503918024885).

Almost surely, 2^{221422047307457} is an apocalyptic number.

It is an amenable number.

221422047307457 is a deficient number, since it is larger than the sum of its proper divisors (593624792083).

221422047307457 is an equidigital number, since it uses as much as digits as its factorization.

221422047307457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593624792082.

The product of its (nonzero) digits is 5268480, while the sum is 50.

The spelling of 221422047307457 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, forty-seven million, three hundred seven thousand, four hundred fifty-seven".