221346434 has 32 divisors (see below), whose sum is σ = 353928960. Its totient is φ = 103606272.

The previous prime is 221346431. The next prime is 221346451. The reversal of 221346434 is 434643122.

It is a junction number, because it is equal to n+sod(n) for n = 221346397 and 221346406.

It is not an unprimeable number, because it can be changed into a prime (221346431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503987 + ... + 504425.

It is an arithmetic number, because the mean of its divisors is an integer number (11060280).

Almost surely, 2^221346434 is an apocalyptic number.

221346434 is a deficient number, since it is larger than the sum of its proper divisors (132582526).

221346434 is a wasteful number, since it uses less digits than its factorization.

221346434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its digits is 13824, while the sum is 29.

The square root of 221346434 is about 14877.7160209489. The cubic root of 221346434 is about 604.9101102705.

Adding to 221346434 its reverse (434643122), we get a palindrome (655989556).

The spelling of 221346434 in words is "two hundred twenty-one million, three hundred forty-six thousand, four hundred thirty-four".