51756253 has 2 divisors, whose sum is σ = 51756254. Its totient is φ = 51756252.

The previous prime is 51756251. The next prime is 51756269. The reversal of 51756253 is 35265715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47582404 + 4173849 = 6898^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 51756253 - 2¹ = 51756251 is a prime.

Together with 51756251, 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 (51756251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25878126 + 25878127.

It is an arithmetic number, because the mean of its divisors is an integer number (25878127).

Almost surely, 2^51756253 is an apocalyptic number.

It is an amenable number.

51756253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51756253 is an equidigital number, since it uses as much as digits as its factorization.

51756253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 34.

The square root of 51756253 is about 7194.1818853849. The cubic root of 51756253 is about 372.6670043758.

The spelling of 51756253 in words is "fifty-one million, seven hundred fifty-six thousand, two hundred fifty-three".