51240521303 has 4 divisors (see below), whose sum is σ = 51352645440. Its totient is φ = 51128397168.

The previous prime is 51240521257. The next prime is 51240521327. The reversal of 51240521303 is 30312504215.

It is a happy number.

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 51240521303 - 2¹⁸ = 51240259159 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 (51240521383) 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, 56061383 + ... + 56062296.

It is an arithmetic number, because the mean of its divisors is an integer number (12838161360).

Almost surely, 2^51240521303 is an apocalyptic number.

51240521303 is a deficient number, since it is larger than the sum of its proper divisors (112124137).

51240521303 is a wasteful number, since it uses less digits than its factorization.

51240521303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112124136.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 51240521303 in words is "fifty-one billion, two hundred forty million, five hundred twenty-one thousand, three hundred three".