221234431434 has 32 divisors (see below), whose sum is σ = 450462919680. Its totient is φ = 72415215600.

The previous prime is 221234431423. The next prime is 221234431469. The reversal of 221234431434 is 434134432122.

221234431434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221234431395 and 221234431404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20512 + ... + 665499.

It is an arithmetic number, because the mean of its divisors is an integer number (14076966240).

Almost surely, 2^221234431434 is an apocalyptic number.

221234431434 is an abundant number, since it is smaller than the sum of its proper divisors (229228488246).

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

221234431434 is a wasteful number, since it uses less digits than its factorization.

221234431434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686986.

The product of its digits is 55296, while the sum is 33.

Adding to 221234431434 its reverse (434134432122), we get a palindrome (655368863556).

The spelling of 221234431434 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred thirty-one thousand, four hundred thirty-four".