50291921 has 4 divisors (see below), whose sum is σ = 50310144. Its totient is φ = 50273700.

The previous prime is 50291911. The next prime is 50291929. The reversal of 50291921 is 12919205.

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 a de Polignac number, because none of the positive numbers 2^k-50291921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50291929) 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, 4025 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (12577536).

Almost surely, 2^50291921 is an apocalyptic number.

It is an amenable number.

50291921 is a deficient number, since it is larger than the sum of its proper divisors (18223).

50291921 is a wasteful number, since it uses less digits than its factorization.

50291921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18222.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 50291921 is about 7091.6797022990. The cubic root of 50291921 is about 369.1187231658.

The spelling of 50291921 in words is "fifty million, two hundred ninety-one thousand, nine hundred twenty-one".