221330424457 has 8 divisors (see below), whose sum is σ = 225007671392. Its totient is φ = 217664172000.

The previous prime is 221330424451. The next prime is 221330424527. The reversal of 221330424457 is 754424033122.

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

It is a cyclic number.

It is not a de Polignac number, because 221330424457 - 2¹¹ = 221330422409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221330424451) 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, 2708019 + ... + 2788552.

It is an arithmetic number, because the mean of its divisors is an integer number (28125958924).

Almost surely, 2^221330424457 is an apocalyptic number.

It is an amenable number.

221330424457 is a deficient number, since it is larger than the sum of its proper divisors (3677246935).

221330424457 is an equidigital number, since it uses as much as digits as its factorization.

221330424457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497239.

The product of its (nonzero) digits is 161280, while the sum is 37.

Adding to 221330424457 its reverse (754424033122), we get a palindrome (975754457579).

The spelling of 221330424457 in words is "two hundred twenty-one billion, three hundred thirty million, four hundred twenty-four thousand, four hundred fifty-seven".