51365533 has 8 divisors (see below), whose sum is σ = 52676568. Its totient is φ = 50067264.

The previous prime is 51365513. The next prime is 51365539. The reversal of 51365533 is 33556315.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 51222649 = 378^2 + 7157^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51365533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51365495 and 51365504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5235 + ... + 11407.

It is an arithmetic number, because the mean of its divisors is an integer number (6584571).

Almost surely, 2^51365533 is an apocalyptic number.

51365533 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51365533 is a deficient number, since it is larger than the sum of its proper divisors (1311035).

51365533 is a wasteful number, since it uses less digits than its factorization.

51365533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383.

The product of its digits is 20250, while the sum is 31.

The square root of 51365533 is about 7166.9751639028. The cubic root of 51365533 is about 371.7268512626.

The spelling of 51365533 in words is "fifty-one million, three hundred sixty-five thousand, five hundred thirty-three".