221432232344442 has 64 divisors (see below), whose sum is σ = 535912527400704. Its totient is φ = 59543767572480.

The previous prime is 221432232344441. The next prime is 221432232344447. The reversal of 221432232344442 is 244443232234122.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 221432232344394 and 221432232344403.

It is not an unprimeable number, because it can be changed into a prime (221432232344441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38885142 + ... + 44214462.

It is an arithmetic number, because the mean of its divisors is an integer number (8373633240636).

Almost surely, 2^{221432232344442} is an apocalyptic number.

221432232344442 is an abundant number, since it is smaller than the sum of its proper divisors (314480295056262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221432232344442 is a wasteful number, since it uses less digits than its factorization.

221432232344442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387543.

The product of its digits is 1769472, while the sum is 42.

Adding to 221432232344442 its reverse (244443232234122), we get a palindrome (465875464578564).

The spelling of 221432232344442 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred thirty-two million, three hundred forty-four thousand, four hundred forty-two".