50201981 has 4 divisors (see below), whose sum is σ = 50227200. Its totient is φ = 50176764.

The previous prime is 50201959. The next prime is 50202013. The reversal of 50201981 is 18910205.

It is a happy number.

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 50201981 - 2¹⁰ = 50200957 is a prime.

It is a super-2 number, since 2×50201981² = 5040477792648722, 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 50201981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50203981) 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, 9341 + ... + 13698.

It is an arithmetic number, because the mean of its divisors is an integer number (12556800).

Almost surely, 2^50201981 is an apocalyptic number.

It is an amenable number.

50201981 is a deficient number, since it is larger than the sum of its proper divisors (25219).

50201981 is a wasteful number, since it uses less digits than its factorization.

50201981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25218.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 50201981 is about 7085.3356307235. The cubic root of 50201981 is about 368.8985529590.

The spelling of 50201981 in words is "fifty million, two hundred one thousand, nine hundred eighty-one".