51256453 has 2 divisors, whose sum is σ = 51256454. Its totient is φ = 51256452.

The previous prime is 51256451. The next prime is 51256477. The reversal of 51256453 is 35465215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36990724 + 14265729 = 6082^2 + 3777^2 .

It is a cyclic number.

It is not a de Polignac number, because 51256453 - 2¹ = 51256451 is a prime.

Together with 51256451, 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 (51256451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628226 + 25628227.

It is an arithmetic number, because the mean of its divisors is an integer number (25628227).

Almost surely, 2^51256453 is an apocalyptic number.

It is an amenable number.

51256453 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256453 is an equidigital number, since it uses as much as digits as its factorization.

51256453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 51256453 is about 7159.3612145219. The cubic root of 51256453 is about 371.4635313600.

It can be divided in two parts, 512 and 56453, that added together give a palindrome (56965).

The spelling of 51256453 in words is "fifty-one million, two hundred fifty-six thousand, four hundred fifty-three".