50855729 has 4 divisors (see below), whose sum is σ = 50870820. Its totient is φ = 50840640.

The previous prime is 50855719. The next prime is 50855731. The reversal of 50855729 is 92755805.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33408400 + 17447329 = 5780^2 + 4177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50855729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50855719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77 + ... + 10085.

It is an arithmetic number, because the mean of its divisors is an integer number (12717705).

Almost surely, 2^50855729 is an apocalyptic number.

It is an amenable number.

50855729 is a deficient number, since it is larger than the sum of its proper divisors (15091).

50855729 is a wasteful number, since it uses less digits than its factorization.

50855729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15090.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 50855729 is about 7131.3202844915. The cubic root of 50855729 is about 370.4929611355.

The spelling of 50855729 in words is "fifty million, eight hundred fifty-five thousand, seven hundred twenty-nine".