50513231551 has 4 divisors (see below), whose sum is σ = 50551471504. Its totient is φ = 50474991600.

The previous prime is 50513231519. The next prime is 50513231563. The reversal of 50513231551 is 15513231505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15513231505 = 5 ⋅3102646301.

It is a cyclic number.

It is not a de Polignac number, because 50513231551 - 2⁵ = 50513231519 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 (50513231581) 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, 19117995 + ... + 19120636.

It is an arithmetic number, because the mean of its divisors is an integer number (12637867876).

Almost surely, 2^50513231551 is an apocalyptic number.

50513231551 is a deficient number, since it is larger than the sum of its proper divisors (38239953).

50513231551 is a wasteful number, since it uses less digits than its factorization.

50513231551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38239952.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 50513231551 in words is "fifty billion, five hundred thirteen million, two hundred thirty-one thousand, five hundred fifty-one".