50164721 has 4 divisors (see below), whose sum is σ = 50328432. Its totient is φ = 50001012.

The previous prime is 50164687. The next prime is 50164729. The reversal of 50164721 is 12746105.

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 50164721 - 2⁶ = 50164657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50164729) 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, 81395 + ... + 82008.

It is an arithmetic number, because the mean of its divisors is an integer number (12582108).

Almost surely, 2^50164721 is an apocalyptic number.

It is an amenable number.

50164721 is a deficient number, since it is larger than the sum of its proper divisors (163711).

50164721 is a wasteful number, since it uses less digits than its factorization.

50164721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163710.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 50164721 is about 7082.7057682781. The cubic root of 50164721 is about 368.8072646488.

The spelling of 50164721 in words is "fifty million, one hundred sixty-four thousand, seven hundred twenty-one".