421352819 has 4 divisors (see below), whose sum is σ = 421395000. Its totient is φ = 421310640.

The previous prime is 421352783. The next prime is 421352831. The reversal of 421352819 is 918253124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421352819 is a prime.

It is a super-2 number, since 2×421352819² = 355076396158493522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421352419) 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, 3284 + ... + 29214.

It is an arithmetic number, because the mean of its divisors is an integer number (105348750).

Almost surely, 2^421352819 is an apocalyptic number.

421352819 is a deficient number, since it is larger than the sum of its proper divisors (42181).

421352819 is a wasteful number, since it uses less digits than its factorization.

421352819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42180.

The product of its digits is 17280, while the sum is 35.

The square root of 421352819 is about 20526.8804010741. The cubic root of 421352819 is about 749.6904316482.

The spelling of 421352819 in words is "four hundred twenty-one million, three hundred fifty-two thousand, eight hundred nineteen".