50561442431 has 4 divisors (see below), whose sum is σ = 53222571000. Its totient is φ = 47900313864.

The previous prime is 50561442419. The next prime is 50561442487. The reversal of 50561442431 is 13424416505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13424416505 = 5 ⋅2684883301.

It is a cyclic number.

It is not a de Polignac number, because 50561442431 - 2¹⁰ = 50561441407 is a prime.

It is a super-2 number, since 2×50561442431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50561442391 and 50561442400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50561442031) 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, 1330564256 + ... + 1330564293.

It is an arithmetic number, because the mean of its divisors is an integer number (13305642750).

Almost surely, 2^50561442431 is an apocalyptic number.

50561442431 is a deficient number, since it is larger than the sum of its proper divisors (2661128569).

50561442431 is a wasteful number, since it uses less digits than its factorization.

50561442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661128568.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 50561442431 its reverse (13424416505), we get a palindrome (63985858936).

The spelling of 50561442431 in words is "fifty billion, five hundred sixty-one million, four hundred forty-two thousand, four hundred thirty-one".