50019721 has 4 divisors (see below), whose sum is σ = 50766352. Its totient is φ = 49273092.

The previous prime is 50019689. The next prime is 50019737. The reversal of 50019721 is 12791005.

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 50019721 - 2⁵ = 50019689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50019521) 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, 373215 + ... + 373348.

It is an arithmetic number, because the mean of its divisors is an integer number (12691588).

Almost surely, 2^50019721 is an apocalyptic number.

It is an amenable number.

50019721 is a deficient number, since it is larger than the sum of its proper divisors (746631).

50019721 is an equidigital number, since it uses as much as digits as its factorization.

50019721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746630.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 50019721 is about 7072.4621596725. The cubic root of 50019721 is about 368.4515786876.

The spelling of 50019721 in words is "fifty million, nineteen thousand, seven hundred twenty-one".