50513681 has 24 divisors (see below), whose sum is σ = 57693384. Its totient is φ = 44042240.

The previous prime is 50513677. The next prime is 50513699. The reversal of 50513681 is 18631505.

It can be written as a sum of positive squares in 4 ways, for example, as 4477456 + 46036225 = 2116^2 + 6785^2 .

It is not a de Polignac number, because 50513681 - 2² = 50513677 is a prime.

It is a super-2 number, since 2×50513681² = 5103263936339522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50512681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368645 + ... + 368781.

It is an arithmetic number, because the mean of its divisors is an integer number (2403891).

Almost surely, 2^50513681 is an apocalyptic number.

It is an amenable number.

50513681 is a deficient number, since it is larger than the sum of its proper divisors (7179703).

50513681 is a wasteful number, since it uses less digits than its factorization.

50513681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 50513681 is about 7107.2977283916. The cubic root of 50513681 is about 369.6604652400.

The spelling of 50513681 in words is "fifty million, five hundred thirteen thousand, six hundred eighty-one".