421132215 has 24 divisors (see below), whose sum is σ = 783822960. Its totient is φ = 192517248.

The previous prime is 421132213. The next prime is 421132237. The reversal of 421132215 is 512231124.

It is not a de Polignac number, because 421132215 - 2¹ = 421132213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 421132191 and 421132200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421132213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285750 + ... + 287219.

It is an arithmetic number, because the mean of its divisors is an integer number (32659290).

Almost surely, 2^421132215 is an apocalyptic number.

421132215 is a deficient number, since it is larger than the sum of its proper divisors (362690745).

421132215 is a wasteful number, since it uses less digits than its factorization.

421132215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572991 (or 572984 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 421132215 is about 20521.5061581746. The cubic root of 421132215 is about 749.5595725266.

Adding to 421132215 its reverse (512231124), we get a palindrome (933363339).

The spelling of 421132215 in words is "four hundred twenty-one million, one hundred thirty-two thousand, two hundred fifteen".