421524219 has 4 divisors (see below), whose sum is σ = 562032296. Its totient is φ = 281016144.

The previous prime is 421524209. The next prime is 421524221. The reversal of 421524219 is 912425124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421524219 - 2¹⁶ = 421458683 is a prime.

It is a super-2 number, since 2×421524219² = 355365334407119922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421524209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70254034 + ... + 70254039.

It is an arithmetic number, because the mean of its divisors is an integer number (140508074).

Almost surely, 2^421524219 is an apocalyptic number.

421524219 is a deficient number, since it is larger than the sum of its proper divisors (140508077).

421524219 is a wasteful number, since it uses less digits than its factorization.

421524219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140508076.

The product of its digits is 5760, while the sum is 30.

The square root of 421524219 is about 20531.0549899415. The cubic root of 421524219 is about 749.7920721378.

The spelling of 421524219 in words is "four hundred twenty-one million, five hundred twenty-four thousand, two hundred nineteen".