221013430 has 32 divisors (see below), whose sum is σ = 459522720. Its totient is φ = 75640320.

The previous prime is 221013409. The next prime is 221013451. The reversal of 221013430 is 34310122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221013409) and next prime (221013451).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57225 + ... + 60964.

It is an arithmetic number, because the mean of its divisors is an integer number (14360085).

Almost surely, 2^221013430 is an apocalyptic number.

221013430 is an abundant number, since it is smaller than the sum of its proper divisors (238509290).

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

221013430 is a wasteful number, since it uses less digits than its factorization.

221013430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118224.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221013430 is about 14866.5204402375. The cubic root of 221013430 is about 604.6066062646.

Adding to 221013430 its reverse (34310122), we get a palindrome (255323552).

The spelling of 221013430 in words is "two hundred twenty-one million, thirteen thousand, four hundred thirty".