51520433 has 8 divisors (see below), whose sum is σ = 51958368. Its totient is φ = 51084864.

The previous prime is 51520423. The next prime is 51520439. The reversal of 51520433 is 33402515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51520433 - 2¹⁰ = 51519409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51520399 and 51520408.

It is not an unprimeable number, because it can be changed into a prime (51520439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86585 + ... + 87177.

It is an arithmetic number, because the mean of its divisors is an integer number (6494796).

Almost surely, 2^51520433 is an apocalyptic number.

It is an amenable number.

51520433 is a deficient number, since it is larger than the sum of its proper divisors (437935).

51520433 is a wasteful number, since it uses less digits than its factorization.

51520433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51520433 is about 7177.7735405904. The cubic root of 51520433 is about 372.1001411711.

Adding to 51520433 its reverse (33402515), we get a palindrome (84922948).

The spelling of 51520433 in words is "fifty-one million, five hundred twenty thousand, four hundred thirty-three".