51504433 has 4 divisors (see below), whose sum is σ = 52600320. Its totient is φ = 50408548.

The previous prime is 51504391. The next prime is 51504437. The reversal of 51504433 is 33440515.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33440515 = 5 ⋅6688103.

It is a cyclic number.

It is not a de Polignac number, because 51504433 - 2²⁵ = 17950001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51504398 and 51504407.

It is not an unprimeable number, because it can be changed into a prime (51504437) 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, 547873 + ... + 547966.

It is an arithmetic number, because the mean of its divisors is an integer number (13150080).

Almost surely, 2^51504433 is an apocalyptic number.

It is an amenable number.

51504433 is a deficient number, since it is larger than the sum of its proper divisors (1095887).

51504433 is a wasteful number, since it uses less digits than its factorization.

51504433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095886.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 51504433 is about 7176.6589023027. The cubic root of 51504433 is about 372.0616178233.

Adding to 51504433 its reverse (33440515), we get a palindrome (84944948).

The spelling of 51504433 in words is "fifty-one million, five hundred four thousand, four hundred thirty-three".