51321253 has 2 divisors, whose sum is σ = 51321254. Its totient is φ = 51321252.

The previous prime is 51321247. The next prime is 51321287. The reversal of 51321253 is 35212315.

51321253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39917124 + 11404129 = 6318^2 + 3377^2 .

It is a cyclic number.

It is not a de Polignac number, because 51321253 - 2⁹ = 51320741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51321203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660626 + 25660627.

It is an arithmetic number, because the mean of its divisors is an integer number (25660627).

Almost surely, 2^51321253 is an apocalyptic number.

It is an amenable number.

51321253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321253 is an equidigital number, since it uses as much as digits as its factorization.

51321253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 51321253 is about 7163.8853285072. The cubic root of 51321253 is about 371.6200040175.

Adding to 51321253 its reverse (35212315), we get a palindrome (86533568).

The spelling of 51321253 in words is "fifty-one million, three hundred twenty-one thousand, two hundred fifty-three".