51537289 has 2 divisors, whose sum is σ = 51537290. Its totient is φ = 51537288.

The previous prime is 51537281. The next prime is 51537293. The reversal of 51537289 is 98273515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47375689 + 4161600 = 6883^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 51537289 - 2³ = 51537281 is a prime.

It is not a weakly prime, because it can be changed into another prime (51537281) 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, 25768644 + 25768645.

It is an arithmetic number, because the mean of its divisors is an integer number (25768645).

Almost surely, 2^51537289 is an apocalyptic number.

It is an amenable number.

51537289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51537289 is an equidigital number, since it uses as much as digits as its factorization.

51537289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 51537289 is about 7178.9476248264. The cubic root of 51537289 is about 372.1407168917.

The spelling of 51537289 in words is "fifty-one million, five hundred thirty-seven thousand, two hundred eighty-nine".