50021866 has 8 divisors (see below), whose sum is σ = 75776004. Its totient is φ = 24763200.

The previous prime is 50021801. The next prime is 50021869. The reversal of 50021866 is 66812005.

It can be written as a sum of positive squares in 2 ways, for example, as 48650625 + 1371241 = 6975^2 + 1171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (50021869) 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, 123615 + ... + 124018.

Almost surely, 2^50021866 is an apocalyptic number.

50021866 is a deficient number, since it is larger than the sum of its proper divisors (25754138).

50021866 is a wasteful number, since it uses less digits than its factorization.

50021866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247736.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 50021866 is about 7072.6138025485. The cubic root of 50021866 is about 368.4568453926.

It can be divided in two parts, 500 and 21866, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 50021866 in words is "fifty million, twenty-one thousand, eight hundred sixty-six".