421722315 has 64 divisors (see below), whose sum is σ = 907269120. Its totient is φ = 181440000.

The previous prime is 421722289. The next prime is 421722331. The reversal of 421722315 is 513227124.

421722315 is a `hidden beast` number, since 421 + 7 + 2 + 231 + 5 = 666.

It is not a de Polignac number, because 421722315 - 2¹⁰ = 421721291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2940 + ... + 29190.

It is an arithmetic number, because the mean of its divisors is an integer number (14176080).

Almost surely, 2^421722315 is an apocalyptic number.

421722315 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421722315 is an abundant number, since it is smaller than the sum of its proper divisors (485546805).

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

421722315 is a wasteful number, since it uses less digits than its factorization.

421722315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26289 (or 26283 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 421722315 is about 20535.8787248075. The cubic root of 421722315 is about 749.9095090823.

Adding to 421722315 its reverse (513227124), we get a palindrome (934949439).

The spelling of 421722315 in words is "four hundred twenty-one million, seven hundred twenty-two thousand, three hundred fifteen".