163221430 has 32 divisors (see below), whose sum is σ = 305923104. Its totient is φ = 62643456.

The previous prime is 163221427. The next prime is 163221431. The reversal of 163221430 is 34122361.

It is a super-2 number, since 2×163221430² = 53282470422489800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23989 + ... + 30031.

It is an arithmetic number, because the mean of its divisors is an integer number (9560097).

Almost surely, 2^163221430 is an apocalyptic number.

163221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163221430 is a deficient number, since it is larger than the sum of its proper divisors (142701674).

163221430 is a wasteful number, since it uses less digits than its factorization.

163221430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 163221430 is about 12775.8142597644. The cubic root of 163221430 is about 546.5028017849.

Adding to 163221430 its reverse (34122361), we get a palindrome (197343791).

The spelling of 163221430 in words is "one hundred sixty-three million, two hundred twenty-one thousand, four hundred thirty".