420331513 has 4 divisors (see below), whose sum is σ = 480378880. Its totient is φ = 360284148.

The previous prime is 420331489. The next prime is 420331531. The reversal of 420331513 is 315133024.

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 de Polignac number, because none of the positive numbers 2^k-420331513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420331013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30023673 + ... + 30023686.

It is an arithmetic number, because the mean of its divisors is an integer number (120094720).

Almost surely, 2^420331513 is an apocalyptic number.

It is an amenable number.

420331513 is a deficient number, since it is larger than the sum of its proper divisors (60047367).

420331513 is an equidigital number, since it uses as much as digits as its factorization.

420331513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60047366.

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

The square root of 420331513 is about 20501.9880255550. The cubic root of 420331513 is about 749.0842232962.

Adding to 420331513 its reverse (315133024), we get a palindrome (735464537).

The spelling of 420331513 in words is "four hundred twenty million, three hundred thirty-one thousand, five hundred thirteen".