51535559 has 2 divisors, whose sum is σ = 51535560. Its totient is φ = 51535558.

The previous prime is 51535537. The next prime is 51535607. The reversal of 51535559 is 95553515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51535559 - 2²⁰ = 50486983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51535859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767779 + 25767780.

It is an arithmetic number, because the mean of its divisors is an integer number (25767780).

Almost surely, 2^51535559 is an apocalyptic number.

51535559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51535559 is an equidigital number, since it uses as much as digits as its factorization.

51535559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84375, while the sum is 38.

The square root of 51535559 is about 7178.8271326171. The cubic root of 51535559 is about 372.1365528475.

The spelling of 51535559 in words is "fifty-one million, five hundred thirty-five thousand, five hundred fifty-nine".