51025113851 has 4 divisors (see below), whose sum is σ = 51033513600. Its totient is φ = 51016714104.

The previous prime is 51025113827. The next prime is 51025113859. The reversal of 51025113851 is 15831152015.

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

It is a cyclic number.

It is not a de Polignac number, because 51025113851 - 2⁶ = 51025113787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51025113859) 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, 4190756 + ... + 4202913.

It is an arithmetic number, because the mean of its divisors is an integer number (12758378400).

Almost surely, 2^51025113851 is an apocalyptic number.

51025113851 is a deficient number, since it is larger than the sum of its proper divisors (8399749).

51025113851 is an equidigital number, since it uses as much as digits as its factorization.

51025113851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8399748.

The product of its (nonzero) digits is 6000, while the sum is 32.

Adding to 51025113851 its reverse (15831152015), we get a palindrome (66856265866).

The spelling of 51025113851 in words is "fifty-one billion, twenty-five million, one hundred thirteen thousand, eight hundred fifty-one".