221340430 has 8 divisors (see below), whose sum is σ = 398412792. Its totient is φ = 88536168.

The previous prime is 221340409. The next prime is 221340439. The reversal of 221340430 is 34043122.

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 = 221340398 and 221340407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221340439) 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 3 ways as a sum of consecutive naturals, for example, 11067012 + ... + 11067031.

It is an arithmetic number, because the mean of its divisors is an integer number (49801599).

Almost surely, 2^221340430 is an apocalyptic number.

221340430 is a deficient number, since it is larger than the sum of its proper divisors (177072362).

221340430 is a wasteful number, since it uses less digits than its factorization.

221340430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22134050.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221340430 is about 14877.5142412972. The cubic root of 221340430 is about 604.9046408455.

Adding to 221340430 its reverse (34043122), we get a palindrome (255383552).

The spelling of 221340430 in words is "two hundred twenty-one million, three hundred forty thousand, four hundred thirty".