51791293 has 2 divisors, whose sum is σ = 51791294. Its totient is φ = 51791292.

The previous prime is 51791291. The next prime is 51791309. The reversal of 51791293 is 39219715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35485849 + 16305444 = 5957^2 + 4038^2 .

It is a cyclic number.

It is not a de Polignac number, because 51791293 - 2¹ = 51791291 is a prime.

It is a super-2 number, since 2×51791293² = 5364676061223698, which contains 22 as substring.

Together with 51791291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51791291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25895646 + 25895647.

It is an arithmetic number, because the mean of its divisors is an integer number (25895647).

Almost surely, 2^51791293 is an apocalyptic number.

It is an amenable number.

51791293 is a deficient number, since it is larger than the sum of its proper divisors (1).

51791293 is an equidigital number, since it uses as much as digits as its factorization.

51791293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 37.

The square root of 51791293 is about 7196.6167745684. The cubic root of 51791293 is about 372.7510863645.

The spelling of 51791293 in words is "fifty-one million, seven hundred ninety-one thousand, two hundred ninety-three".