50556581 has 4 divisors (see below), whose sum is σ = 50839200. Its totient is φ = 50273964.

The previous prime is 50556577. The next prime is 50556601. The reversal of 50556581 is 18565505.

50556581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50556581 - 2² = 50556577 is a prime.

It is a super-2 number, since 2×50556581² = 5111935764819122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50556551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141041 + ... + 141398.

It is an arithmetic number, because the mean of its divisors is an integer number (12709800).

Almost surely, 2^50556581 is an apocalyptic number.

It is an amenable number.

50556581 is a deficient number, since it is larger than the sum of its proper divisors (282619).

50556581 is a wasteful number, since it uses less digits than its factorization.

50556581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282618.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 50556581 is about 7110.3151125671. The cubic root of 50556581 is about 369.7650834106.

The spelling of 50556581 in words is "fifty million, five hundred fifty-six thousand, five hundred eighty-one".