50002721 has 4 divisors (see below), whose sum is σ = 51615744. Its totient is φ = 48389700.

The previous prime is 50002697. The next prime is 50002741. The reversal of 50002721 is 12720005.

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 50002721 - 2¹⁸ = 49740577 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50002721.

It is not an unprimeable number, because it can be changed into a prime (50002741) 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, 806465 + ... + 806526.

It is an arithmetic number, because the mean of its divisors is an integer number (12903936).

Almost surely, 2^50002721 is an apocalyptic number.

It is an amenable number.

50002721 is a deficient number, since it is larger than the sum of its proper divisors (1613023).

50002721 is a wasteful number, since it uses less digits than its factorization.

50002721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613022.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 50002721 is about 7071.2602130031. The cubic root of 50002721 is about 368.4098325760.

Adding to 50002721 its reverse (12720005), we get a palindrome (62722726).

The spelling of 50002721 in words is "fifty million, two thousand, seven hundred twenty-one".