51243233544 has 48 divisors (see below), whose sum is σ = 138821315100. Its totient is φ = 17076455424.

The previous prime is 51243233533. The next prime is 51243233551. The reversal of 51243233544 is 44533234215.

51243233544 is a `hidden beast` number, since 51 + 2 + 4 + 32 + 33 + 544 = 666.

51243233544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40994100900 + 10249132644 = 202470^2 + 101238^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51243233499 and 51243233508.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176952 + ... + 365784.

Almost surely, 2^51243233544 is an apocalyptic number.

It is an amenable number.

51243233544 is an abundant number, since it is smaller than the sum of its proper divisors (87578081556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51243233544 is a wasteful number, since it uses less digits than its factorization.

51243233544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192614 (or 192607 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

Adding to 51243233544 its reverse (44533234215), we get a palindrome (95776467759).

The spelling of 51243233544 in words is "fifty-one billion, two hundred forty-three million, two hundred thirty-three thousand, five hundred forty-four".