50971921 has 24 divisors (see below), whose sum is σ = 68831424. Its totient is φ = 36653760.

The previous prime is 50971909. The next prime is 50971939. The reversal of 50971921 is 12917905.

It is not a de Polignac number, because 50971921 - 2⁷ = 50971793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50971901) 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, 11055 + ... + 14971.

It is an arithmetic number, because the mean of its divisors is an integer number (2867976).

Almost surely, 2^50971921 is an apocalyptic number.

It is an amenable number.

50971921 is a deficient number, since it is larger than the sum of its proper divisors (17859503).

50971921 is a wasteful number, since it uses less digits than its factorization.

50971921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 50971921 is about 7139.4622346505. The cubic root of 50971921 is about 370.7749062630.

The spelling of 50971921 in words is "fifty million, nine hundred seventy-one thousand, nine hundred twenty-one".