51252613 has 2 divisors, whose sum is σ = 51252614. Its totient is φ = 51252612.

The previous prime is 51252559. The next prime is 51252623. The reversal of 51252613 is 31625215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50936769 + 315844 = 7137^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 51252613 - 2²¹ = 49155461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51252623) 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, 25626306 + 25626307.

It is an arithmetic number, because the mean of its divisors is an integer number (25626307).

Almost surely, 2^51252613 is an apocalyptic number.

It is an amenable number.

51252613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51252613 is an equidigital number, since it uses as much as digits as its factorization.

51252613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 51252613 is about 7159.0930291483. The cubic root of 51252613 is about 371.4542547681.

Adding to 51252613 its reverse (31625215), we get a palindrome (82877828).

The spelling of 51252613 in words is "fifty-one million, two hundred fifty-two thousand, six hundred thirteen".