421331530 has 8 divisors (see below), whose sum is σ = 758396772. Its totient is φ = 168532608.

The previous prime is 421331513. The next prime is 421331551. The reversal of 421331530 is 35133124.

It can be written as a sum of positive squares in 2 ways, for example, as 387656721 + 33674809 = 19689^2 + 5803^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21066567 + ... + 21066586.

Almost surely, 2^421331530 is an apocalyptic number.

421331530 is a deficient number, since it is larger than the sum of its proper divisors (337065242).

421331530 is a wasteful number, since it uses less digits than its factorization.

421331530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42133160.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 421331530 is about 20526.3618305826. The cubic root of 421331530 is about 749.6778053110.

Adding to 421331530 its reverse (35133124), we get a palindrome (456464654).

The spelling of 421331530 in words is "four hundred twenty-one million, three hundred thirty-one thousand, five hundred thirty".