51304235525 has 18 divisors (see below), whose sum is σ = 63712037682. Its totient is φ = 40982316000.

The previous prime is 51304235491. The next prime is 51304235561. The reversal of 51304235525 is 52553240315.

It can be written as a sum of positive squares in 3 ways, for example, as 1079521 + 51303156004 = 1039^2 + 226502^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51304235525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26987075 + ... + 26988975.

It is an arithmetic number, because the mean of its divisors is an integer number (3539557649).

Almost surely, 2^51304235525 is an apocalyptic number.

It is an amenable number.

51304235525 is a deficient number, since it is larger than the sum of its proper divisors (12407802157).

51304235525 is an equidigital number, since it uses as much as digits as its factorization.

51304235525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989 (or 2945 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 51304235525 in words is "fifty-one billion, three hundred four million, two hundred thirty-five thousand, five hundred twenty-five".