51236791 has 4 divisors (see below), whose sum is σ = 51310584. Its totient is φ = 51163000.

The previous prime is 51236789. The next prime is 51236807. The reversal of 51236791 is 19763215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51236791 - 2¹ = 51236789 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 (51236701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35845 + ... + 37246.

It is an arithmetic number, because the mean of its divisors is an integer number (12827646).

Almost surely, 2^51236791 is an apocalyptic number.

51236791 is a deficient number, since it is larger than the sum of its proper divisors (73793).

51236791 is an equidigital number, since it uses as much as digits as its factorization.

51236791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73792.

The product of its digits is 11340, while the sum is 34.

The square root of 51236791 is about 7157.9879156087. The cubic root of 51236791 is about 371.4160274222.

The spelling of 51236791 in words is "fifty-one million, two hundred thirty-six thousand, seven hundred ninety-one".