50556509 has 2 divisors, whose sum is σ = 50556510. Its totient is φ = 50556508.

The previous prime is 50556491. The next prime is 50556523. The reversal of 50556509 is 90565505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 2184484 = 6955^2 + 1478^2 .

It is a cyclic number.

It is not a de Polignac number, because 50556509 - 2²⁴ = 33779293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50556529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25278254 + 25278255.

It is an arithmetic number, because the mean of its divisors is an integer number (25278255).

Almost surely, 2^50556509 is an apocalyptic number.

It is an amenable number.

50556509 is a deficient number, since it is larger than the sum of its proper divisors (1).

50556509 is an equidigital number, since it uses as much as digits as its factorization.

50556509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 50556509 is about 7110.3100494985. The cubic root of 50556509 is about 369.7649078772.

The spelling of 50556509 in words is "fifty million, five hundred fifty-six thousand, five hundred nine".