51544211413 has 4 divisors (see below), whose sum is σ = 52742914048. Its totient is φ = 50345508780.

The previous prime is 51544211399. The next prime is 51544211417. The reversal of 51544211413 is 31411244515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51544211413 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 (51544211417) 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, 599351253 + ... + 599351338.

It is an arithmetic number, because the mean of its divisors is an integer number (13185728512).

Almost surely, 2^51544211413 is an apocalyptic number.

It is an amenable number.

51544211413 is a deficient number, since it is larger than the sum of its proper divisors (1198702635).

51544211413 is a wasteful number, since it uses less digits than its factorization.

51544211413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198702634.

The product of its digits is 9600, while the sum is 31.

Adding to 51544211413 its reverse (31411244515), we get a palindrome (82955455928).

The spelling of 51544211413 in words is "fifty-one billion, five hundred forty-four million, two hundred eleven thousand, four hundred thirteen".