51451433433 has 24 divisors (see below), whose sum is σ = 75435816456. Its totient is φ = 33788832000.

The previous prime is 51451433431. The next prime is 51451433479. The reversal of 51451433433 is 33433415415.

It can be written as a sum of positive squares in 4 ways, for example, as 49796815104 + 1654618329 = 223152^2 + 40677^2 .

It is not a de Polignac number, because 51451433433 - 2¹ = 51451433431 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51451433431) 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 23 ways as a sum of consecutive naturals, for example, 35413 + ... + 322733.

It is an arithmetic number, because the mean of its divisors is an integer number (3143159019).

Almost surely, 2^51451433433 is an apocalyptic number.

It is an amenable number.

51451433433 is a deficient number, since it is larger than the sum of its proper divisors (23984383023).

51451433433 is a wasteful number, since it uses less digits than its factorization.

51451433433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287625 (or 287622 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 51451433433 its reverse (33433415415), we get a palindrome (84884848848).

The spelling of 51451433433 in words is "fifty-one billion, four hundred fifty-one million, four hundred thirty-three thousand, four hundred thirty-three".