221344534514377 has 4 divisors (see below), whose sum is σ = 221410984392976. Its totient is φ = 221278084635780.

The previous prime is 221344534514339. The next prime is 221344534514393. The reversal of 221344534514377 is 773415435443122.

221344534514377 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221344534514377 - 2²³ = 221344526125769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221344534014377) 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, 33224934303 + ... + 33224940964.

It is an arithmetic number, because the mean of its divisors is an integer number (55352746098244).

Almost surely, 2^{221344534514377} is an apocalyptic number.

It is an amenable number.

221344534514377 is a deficient number, since it is larger than the sum of its proper divisors (66449878599).

221344534514377 is an equidigital number, since it uses as much as digits as its factorization.

221344534514377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66449878598.

The product of its digits is 33868800, while the sum is 55.

Adding to 221344534514377 its reverse (773415435443122), we get a palindrome (994759969957499).

The spelling of 221344534514377 in words is "two hundred twenty-one trillion, three hundred forty-four billion, five hundred thirty-four million, five hundred fourteen thousand, three hundred seventy-seven".