51783269 has 2 divisors, whose sum is σ = 51783270. Its totient is φ = 51783268.

The previous prime is 51783247. The next prime is 51783271. The reversal of 51783269 is 96238715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49420900 + 2362369 = 7030^2 + 1537^2 .

It is a cyclic number.

It is not a de Polignac number, because 51783269 - 2¹² = 51779173 is a prime.

It is a super-2 number, since 2×51783269² = 5363013896652722, which contains 22 as substring.

Together with 51783271, 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 (51783229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25891634 + 25891635.

It is an arithmetic number, because the mean of its divisors is an integer number (25891635).

Almost surely, 2^51783269 is an apocalyptic number.

It is an amenable number.

51783269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51783269 is an equidigital number, since it uses as much as digits as its factorization.

51783269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 51783269 is about 7196.0592687943. The cubic root of 51783269 is about 372.7318353217.

The spelling of 51783269 in words is "fifty-one million, seven hundred eighty-three thousand, two hundred sixty-nine".