50271981 has 4 divisors (see below), whose sum is σ = 67029312. Its totient is φ = 33514652.

The previous prime is 50271979. The next prime is 50271983. The reversal of 50271981 is 18917205.

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 an interprime number because it is at equal distance from previous prime (50271979) and next prime (50271983).

It is a cyclic number.

It is not a de Polignac number, because 50271981 - 2¹ = 50271979 is a prime.

It is a super-2 number, since 2×50271981² = 5054544147328722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50271983) 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, 8378661 + ... + 8378666.

It is an arithmetic number, because the mean of its divisors is an integer number (16757328).

Almost surely, 2^50271981 is an apocalyptic number.

It is an amenable number.

50271981 is a deficient number, since it is larger than the sum of its proper divisors (16757331).

50271981 is a wasteful number, since it uses less digits than its factorization.

50271981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16757330.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 50271981 is about 7090.2736900630. The cubic root of 50271981 is about 369.0699333526.

The spelling of 50271981 in words is "fifty million, two hundred seventy-one thousand, nine hundred eighty-one".