51733663 has 4 divisors (see below), whose sum is σ = 51789240. Its totient is φ = 51678088.

The previous prime is 51733631. The next prime is 51733679. The reversal of 51733663 is 36633715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36633715 = 5 ⋅7326743.

It is a cyclic number.

It is not a de Polignac number, because 51733663 - 2⁵ = 51733631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51733763) 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, 26368 + ... + 28261.

It is an arithmetic number, because the mean of its divisors is an integer number (12947310).

Almost surely, 2^51733663 is an apocalyptic number.

51733663 is a deficient number, since it is larger than the sum of its proper divisors (55577).

51733663 is an equidigital number, since it uses as much as digits as its factorization.

51733663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55576.

The product of its digits is 34020, while the sum is 34.

The square root of 51733663 is about 7192.6116953440. The cubic root of 51733663 is about 372.6127772873.

It can be divided in two parts, 5173 and 3663, that added together give a square (8836 = 94²).

The spelling of 51733663 in words is "fifty-one million, seven hundred thirty-three thousand, six hundred sixty-three".