51131450023 has 4 divisors (see below), whose sum is σ = 51132380328. Its totient is φ = 51130519720.

The previous prime is 51131449991. The next prime is 51131450093. The reversal of 51131450023 is 32005413115.

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 51131450023 - 2⁵ = 51131449991 is a prime.

It is a super-3 number, since 3×51131450023³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51131450023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51131450093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377161 + ... + 494482.

It is an arithmetic number, because the mean of its divisors is an integer number (12783095082).

Almost surely, 2^51131450023 is an apocalyptic number.

51131450023 is a deficient number, since it is larger than the sum of its proper divisors (930305).

51131450023 is an equidigital number, since it uses as much as digits as its factorization.

51131450023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930304.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 51131450023 its reverse (32005413115), we get a palindrome (83136863138).

The spelling of 51131450023 in words is "fifty-one billion, one hundred thirty-one million, four hundred fifty thousand, twenty-three".