51525413 has 2 divisors, whose sum is σ = 51525414. Its totient is φ = 51525412.

The previous prime is 51525391. The next prime is 51525421. The reversal of 51525413 is 31452515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49098049 + 2427364 = 7007^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 51525413 - 2¹⁸ = 51263269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51525433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25762706 + 25762707.

It is an arithmetic number, because the mean of its divisors is an integer number (25762707).

Almost surely, 2^51525413 is an apocalyptic number.

It is an amenable number.

51525413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51525413 is an equidigital number, since it uses as much as digits as its factorization.

51525413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 26.

The square root of 51525413 is about 7178.1204364374. The cubic root of 51525413 is about 372.1121299355.

Adding to 51525413 its reverse (31452515), we get a palindrome (82977928).

The spelling of 51525413 in words is "fifty-one million, five hundred twenty-five thousand, four hundred thirteen".