51222430013 has 4 divisors (see below), whose sum is σ = 51839567808. Its totient is φ = 50605292220.

The previous prime is 51222429997. The next prime is 51222430121. The reversal of 51222430013 is 31003422215.

51222430013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51222430013 - 2⁴ = 51222429997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222430313) 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, 308568773 + ... + 308568938.

It is an arithmetic number, because the mean of its divisors is an integer number (12959891952).

Almost surely, 2^51222430013 is an apocalyptic number.

It is an amenable number.

51222430013 is a deficient number, since it is larger than the sum of its proper divisors (617137795).

51222430013 is an equidigital number, since it uses as much as digits as its factorization.

51222430013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617137794.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 51222430013 its reverse (31003422215), we get a palindrome (82225852228).

The spelling of 51222430013 in words is "fifty-one billion, two hundred twenty-two million, four hundred thirty thousand, thirteen".