51845537 has 2 divisors, whose sum is σ = 51845538. Its totient is φ = 51845536.

The previous prime is 51845527. The next prime is 51845539. The reversal of 51845537 is 73554815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32273761 + 19571776 = 5681^2 + 4424^2 .

It is a cyclic number.

It is not a de Polignac number, because 51845537 - 2¹² = 51841441 is a prime.

Together with 51845539, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51845537.

It is not a weakly prime, because it can be changed into another prime (51845539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25922768 + 25922769.

It is an arithmetic number, because the mean of its divisors is an integer number (25922769).

Almost surely, 2^51845537 is an apocalyptic number.

It is an amenable number.

51845537 is a deficient number, since it is larger than the sum of its proper divisors (1).

51845537 is an equidigital number, since it uses as much as digits as its factorization.

51845537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 51845537 is about 7200.3845036220. The cubic root of 51845537 is about 372.8811755091.

The spelling of 51845537 in words is "fifty-one million, eight hundred forty-five thousand, five hundred thirty-seven".