50557 has 4 divisors (see below), whose sum is σ = 54460. Its totient is φ = 46656.

The previous prime is 50551. The next prime is 50581. The reversal of 50557 is 75505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75505 = 5 ⋅15101.

It can be written as a sum of positive squares in 2 ways, for example, as 21316 + 29241 = 146^2 + 171^2 .

It is a 6-Lehmer number, since φ(50557) divides (50557-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 50557 - 2³ = 50549 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50551) 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, 1932 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (13615).

2⁵⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

50557 is a deficient number, since it is larger than the sum of its proper divisors (3903).

50557 is a wasteful number, since it uses less digits than its factorization.

50557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902.

The product of its (nonzero) digits is 875, while the sum is 22.

The square root of 50557 is about 224.8488381113. The cubic root of 50557 is about 36.9766104914.

The spelling of 50557 in words is "fifty thousand, five hundred fifty-seven".