421530313 has 4 divisors (see below), whose sum is σ = 428440708. Its totient is φ = 414619920.

The previous prime is 421530301. The next prime is 421530353. The reversal of 421530313 is 313035124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81054009 + 340476304 = 9003^2 + 18452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421530313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421530353) 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, 3455106 + ... + 3455227.

It is an arithmetic number, because the mean of its divisors is an integer number (107110177).

Almost surely, 2^421530313 is an apocalyptic number.

It is an amenable number.

421530313 is a deficient number, since it is larger than the sum of its proper divisors (6910395).

421530313 is an equidigital number, since it uses as much as digits as its factorization.

421530313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910394.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 421530313 is about 20531.2033987295. The cubic root of 421530313 is about 749.7956853828.

Adding to 421530313 its reverse (313035124), we get a palindrome (734565437).

The spelling of 421530313 in words is "four hundred twenty-one million, five hundred thirty thousand, three hundred thirteen".