50712281 has 4 divisors (see below), whose sum is σ = 50728932. Its totient is φ = 50695632.

The previous prime is 50712269. The next prime is 50712287. The reversal of 50712281 is 18221705.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22886656 + 27825625 = 4784^2 + 5275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50712281 is a prime.

It is a super-2 number, since 2×50712281² = 5143470888445922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50712281.

It is not an unprimeable number, because it can be changed into a prime (50712287) 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, 2306 + ... + 10331.

It is an arithmetic number, because the mean of its divisors is an integer number (12682233).

Almost surely, 2^50712281 is an apocalyptic number.

It is an amenable number.

50712281 is a deficient number, since it is larger than the sum of its proper divisors (16651).

50712281 is a wasteful number, since it uses less digits than its factorization.

50712281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 50712281 is about 7121.2555774947. The cubic root of 50712281 is about 370.1442850957.

Adding to 50712281 its reverse (18221705), we get a palindrome (68933986).

The spelling of 50712281 in words is "fifty million, seven hundred twelve thousand, two hundred eighty-one".