421505219 has 4 divisors (see below), whose sum is σ = 425678640. Its totient is φ = 417331800.

The previous prime is 421505213. The next prime is 421505239. The reversal of 421505219 is 912505124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421505219 is a prime.

It is a super-2 number, since 2×421505219² = 355333299288475922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421505191 and 421505200.

It is not an unprimeable number, because it can be changed into a prime (421505213) 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, 2086559 + ... + 2086760.

It is an arithmetic number, because the mean of its divisors is an integer number (106419660).

Almost surely, 2^421505219 is an apocalyptic number.

421505219 is a deficient number, since it is larger than the sum of its proper divisors (4173421).

421505219 is a wasteful number, since it uses less digits than its factorization.

421505219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173420.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 421505219 is about 20530.5922710476. The cubic root of 421505219 is about 749.7808064637.

The spelling of 421505219 in words is "four hundred twenty-one million, five hundred five thousand, two hundred nineteen".