51500312053 has 4 divisors (see below), whose sum is σ = 52472016108. Its totient is φ = 50528608000.

The previous prime is 51500311981. The next prime is 51500312089. The reversal of 51500312053 is 35021300515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24585612804 + 26914699249 = 156798^2 + 164057^2 .

It is a cyclic number.

It is not a de Polignac number, because 51500312053 - 2¹³ = 51500303861 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 (51500312153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485851948 + ... + 485852053.

It is an arithmetic number, because the mean of its divisors is an integer number (13118004027).

Almost surely, 2^51500312053 is an apocalyptic number.

51500312053 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51500312053 is a deficient number, since it is larger than the sum of its proper divisors (971704055).

51500312053 is an equidigital number, since it uses as much as digits as its factorization.

51500312053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971704054.

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 51500312053 its reverse (35021300515), we get a palindrome (86521612568).

The spelling of 51500312053 in words is "fifty-one billion, five hundred million, three hundred twelve thousand, fifty-three".