421333513 has 4 divisors (see below), whose sum is σ = 422822608. Its totient is φ = 419844420.

The previous prime is 421333511. The next prime is 421333537. The reversal of 421333513 is 315333124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421333513 - 2¹ = 421333511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421333511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744123 + ... + 744688.

It is an arithmetic number, because the mean of its divisors is an integer number (105705652).

Almost surely, 2^421333513 is an apocalyptic number.

It is an amenable number.

421333513 is a deficient number, since it is larger than the sum of its proper divisors (1489095).

421333513 is a wasteful number, since it uses less digits than its factorization.

421333513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489094.

The product of its digits is 3240, while the sum is 25.

The square root of 421333513 is about 20526.4101342636. The cubic root of 421333513 is about 749.6789814305.

Adding to 421333513 its reverse (315333124), we get a palindrome (736666637).

The spelling of 421333513 in words is "four hundred twenty-one million, three hundred thirty-three thousand, five hundred thirteen".