51540733 has 4 divisors (see below), whose sum is σ = 51555100. Its totient is φ = 51526368.

The previous prime is 51540707. The next prime is 51540757. The reversal of 51540733 is 33704515.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 43599609 + 7941124 = 6603^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 51540733 - 2²⁵ = 17986301 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 (51540233) 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, 3241 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (12888775).

Almost surely, 2^51540733 is an apocalyptic number.

It is an amenable number.

51540733 is a deficient number, since it is larger than the sum of its proper divisors (14367).

51540733 is an equidigital number, since it uses as much as digits as its factorization.

51540733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14366.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 51540733 is about 7179.1874888458. The cubic root of 51540733 is about 372.1490061913.

The spelling of 51540733 in words is "fifty-one million, five hundred forty thousand, seven hundred thirty-three".