51245113 has 4 divisors (see below), whose sum is σ = 51862608. Its totient is φ = 50627620.

The previous prime is 51245107. The next prime is 51245141. The reversal of 51245113 is 31154215.

It is a happy number.

51245113 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 51245113 - 2²⁵ = 17690681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51245213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308623 + ... + 308788.

It is an arithmetic number, because the mean of its divisors is an integer number (12965652).

Almost surely, 2^51245113 is an apocalyptic number.

It is an amenable number.

51245113 is a deficient number, since it is larger than the sum of its proper divisors (617495).

51245113 is an equidigital number, since it uses as much as digits as its factorization.

51245113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617494.

The product of its digits is 600, while the sum is 22.

The square root of 51245113 is about 7158.5692006154. The cubic root of 51245113 is about 371.4361350883.

Adding to 51245113 its reverse (31154215), we get a palindrome (82399328).

The spelling of 51245113 in words is "fifty-one million, two hundred forty-five thousand, one hundred thirteen".