221432434 has 8 divisors (see below), whose sum is σ = 335253168. Its totient is φ = 109681380.

The previous prime is 221432417. The next prime is 221432437. The reversal of 221432434 is 434234122.

It is a happy number.

221432434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 221432399 and 221432408.

It is not an unprimeable number, because it can be changed into a prime (221432437) 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, 517152 + ... + 517579.

It is an arithmetic number, because the mean of its divisors is an integer number (41906646).

Almost surely, 2^221432434 is an apocalyptic number.

221432434 is a deficient number, since it is larger than the sum of its proper divisors (113820734).

221432434 is a wasteful number, since it uses less digits than its factorization.

221432434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034840.

The product of its digits is 4608, while the sum is 25.

The square root of 221432434 is about 14880.6059688441. The cubic root of 221432434 is about 604.9884422809.

Adding to 221432434 its reverse (434234122), we get a palindrome (655666556).

The spelling of 221432434 in words is "two hundred twenty-one million, four hundred thirty-two thousand, four hundred thirty-four".