221434031442 has 16 divisors (see below), whose sum is σ = 476934837120. Its totient is φ = 68133548112.

The previous prime is 221434031431. The next prime is 221434031449. The reversal of 221434031442 is 244130434122.

It is not an unprimeable number, because it can be changed into a prime (221434031449) 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, 1419448842 + ... + 1419448997.

It is an arithmetic number, because the mean of its divisors is an integer number (29808427320).

Almost surely, 2^221434031442 is an apocalyptic number.

221434031442 is an abundant number, since it is smaller than the sum of its proper divisors (255500805678).

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

221434031442 is a wasteful number, since it uses less digits than its factorization.

221434031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838897857.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 221434031442 its reverse (244130434122), we get a palindrome (465564465564).

The spelling of 221434031442 in words is "two hundred twenty-one billion, four hundred thirty-four million, thirty-one thousand, four hundred forty-two".