221430462 has 32 divisors (see below), whose sum is σ = 489749760. Its totient is φ = 66179520.

The previous prime is 221430439. The next prime is 221430527. The reversal of 221430462 is 264034122.

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, 18162 + ... + 27797.

It is an arithmetic number, because the mean of its divisors is an integer number (15304680).

Almost surely, 2^221430462 is an apocalyptic number.

221430462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221430462 is an abundant number, since it is smaller than the sum of its proper divisors (268319298).

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

221430462 is a wasteful number, since it uses less digits than its factorization.

221430462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46048.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 221430462 is about 14880.5397079541. The cubic root of 221430462 is about 604.9866463369.

Adding to 221430462 its reverse (264034122), we get a palindrome (485464584).

The spelling of 221430462 in words is "two hundred twenty-one million, four hundred thirty thousand, four hundred sixty-two".