50519981 has 4 divisors (see below), whose sum is σ = 50746752. Its totient is φ = 50293212.

The previous prime is 50519951. The next prime is 50519999. The reversal of 50519981 is 18991505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50519981 - 2²² = 46325677 is a prime.

It is a super-2 number, since 2×50519981² = 5104536960480722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50519951) 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, 113051 + ... + 113496.

It is an arithmetic number, because the mean of its divisors is an integer number (12686688).

Almost surely, 2^50519981 is an apocalyptic number.

It is an amenable number.

50519981 is a deficient number, since it is larger than the sum of its proper divisors (226771).

50519981 is a wasteful number, since it uses less digits than its factorization.

50519981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226770.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 50519981 is about 7107.7409209959. The cubic root of 50519981 is about 369.6758324572.

The spelling of 50519981 in words is "fifty million, five hundred nineteen thousand, nine hundred eighty-one".