51495253 has 2 divisors, whose sum is σ = 51495254. Its totient is φ = 51495252.

The previous prime is 51495251. The next prime is 51495293. The reversal of 51495253 is 35259415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50367409 + 1127844 = 7097^2 + 1062^2 .

It is a cyclic number.

It is not a de Polignac number, because 51495253 - 2¹ = 51495251 is a prime.

It is a super-2 number, since 2×51495253² = 5303522163068018, which contains 22 as substring.

Together with 51495251, 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 (51495251) 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, 25747626 + 25747627.

It is an arithmetic number, because the mean of its divisors is an integer number (25747627).

Almost surely, 2^51495253 is an apocalyptic number.

It is an amenable number.

51495253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51495253 is an equidigital number, since it uses as much as digits as its factorization.

51495253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 51495253 is about 7176.0193004200. The cubic root of 51495253 is about 372.0395114505.

The spelling of 51495253 in words is "fifty-one million, four hundred ninety-five thousand, two hundred fifty-three".