50555557 has 4 divisors (see below), whose sum is σ = 54444460. Its totient is φ = 46666656.

The previous prime is 50555543. The next prime is 50555563. The reversal of 50555557 is 75555505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75555505 = 5 ⋅15111101.

It can be written as a sum of positive squares in 2 ways, for example, as 4124961 + 46430596 = 2031^2 + 6814^2 .

It is a cyclic number.

It is not a de Polignac number, because 50555557 - 2⁷ = 50555429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50555537) 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, 1944432 + ... + 1944457.

It is an arithmetic number, because the mean of its divisors is an integer number (13611115).

Almost surely, 2^50555557 is an apocalyptic number.

It is an amenable number.

50555557 is a deficient number, since it is larger than the sum of its proper divisors (3888903).

50555557 is a wasteful number, since it uses less digits than its factorization.

50555557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888902.

The product of its (nonzero) digits is 109375, while the sum is 37.

The square root of 50555557 is about 7110.2431041421. The cubic root of 50555557 is about 369.7625869205.

The spelling of 50555557 in words is "fifty million, five hundred fifty-five thousand, five hundred fifty-seven".