51249529 has 2 divisors, whose sum is σ = 51249530. Its totient is φ = 51249528.

The previous prime is 51249503. The next prime is 51249533. The reversal of 51249529 is 92594215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43560000 + 7689529 = 6600^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 51249529 - 2⁹ = 51249017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51249929) 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, 25624764 + 25624765.

It is an arithmetic number, because the mean of its divisors is an integer number (25624765).

Almost surely, 2^51249529 is an apocalyptic number.

It is an amenable number.

51249529 is a deficient number, since it is larger than the sum of its proper divisors (1).

51249529 is an equidigital number, since it uses as much as digits as its factorization.

51249529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 51249529 is about 7158.8776354957. The cubic root of 51249529 is about 371.4468041698.

The spelling of 51249529 in words is "fifty-one million, two hundred forty-nine thousand, five hundred twenty-nine".