51125322247 has 8 divisors (see below), whose sum is σ = 51707181600. Its totient is φ = 50543627904.

The previous prime is 51125322229. The next prime is 51125322251. The reversal of 51125322247 is 74222352115.

51125322247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51125322247 is a prime.

It is a super-2 number, since 2×51125322247² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125325247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646779 + ... + 721507.

It is an arithmetic number, because the mean of its divisors is an integer number (6463397700).

Almost surely, 2^51125322247 is an apocalyptic number.

51125322247 is a deficient number, since it is larger than the sum of its proper divisors (581859353).

51125322247 is an equidigital number, since it uses as much as digits as its factorization.

51125322247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82505.

The product of its digits is 33600, while the sum is 34.

The spelling of 51125322247 in words is "fifty-one billion, one hundred twenty-five million, three hundred twenty-two thousand, two hundred forty-seven".