51733391 has 2 divisors, whose sum is σ = 51733392. Its totient is φ = 51733390.

The previous prime is 51733379. The next prime is 51733393. The reversal of 51733391 is 19333715.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51733391 is a prime.

Together with 51733393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51733393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25866695 + 25866696.

It is an arithmetic number, because the mean of its divisors is an integer number (25866696).

Almost surely, 2^51733391 is an apocalyptic number.

51733391 is a deficient number, since it is larger than the sum of its proper divisors (1).

51733391 is an equidigital number, since it uses as much as digits as its factorization.

51733391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505, while the sum is 32.

The square root of 51733391 is about 7192.5927870275. The cubic root of 51733391 is about 372.6121242576.

The spelling of 51733391 in words is "fifty-one million, seven hundred thirty-three thousand, three hundred ninety-one".