51493271 has 2 divisors, whose sum is σ = 51493272. Its totient is φ = 51493270.

The previous prime is 51493261. The next prime is 51493279. The reversal of 51493271 is 17239415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51493271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51493279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746635 + 25746636.

It is an arithmetic number, because the mean of its divisors is an integer number (25746636).

Almost surely, 2^51493271 is an apocalyptic number.

51493271 is a deficient number, since it is larger than the sum of its proper divisors (1).

51493271 is an equidigital number, since it uses as much as digits as its factorization.

51493271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 51493271 is about 7175.8812002429. The cubic root of 51493271 is about 372.0347382482.

The spelling of 51493271 in words is "fifty-one million, four hundred ninety-three thousand, two hundred seventy-one".