50561578 has 4 divisors (see below), whose sum is σ = 75842370. Its totient is φ = 25280788.

The previous prime is 50561557. The next prime is 50561579. The reversal of 50561578 is 87516505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87516505 = 5 ⋅17503301.

It can be written as a sum of positive squares in only one way, i.e., 31438449 + 19123129 = 5607^2 + 4373^2 .

It is not an unprimeable number, because it can be changed into a prime (50561579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12640393 + ... + 12640396.

Almost surely, 2^50561578 is an apocalyptic number.

50561578 is a deficient number, since it is larger than the sum of its proper divisors (25280792).

50561578 is a wasteful number, since it uses less digits than its factorization.

50561578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280791.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 50561578 is about 7110.6664947809. Note that the first 3 decimals coincide. The cubic root of 50561578 is about 369.7772655058. Note that the first 3 decimals are identical.

The spelling of 50561578 in words is "fifty million, five hundred sixty-one thousand, five hundred seventy-eight".