50196721 has 4 divisors (see below), whose sum is σ = 50217444. Its totient is φ = 50176000.

The previous prime is 50196691. The next prime is 50196739. The reversal of 50196721 is 12769105.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9734400 + 40462321 = 3120^2 + 6361^2 .

It is a 4-Lehmer number, since φ(50196721) divides (50196721-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 50196721 - 2¹³ = 50188529 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50196221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6160 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (12554361).

Almost surely, 2^50196721 is an apocalyptic number.

It is an amenable number.

50196721 is a deficient number, since it is larger than the sum of its proper divisors (20723).

50196721 is a wasteful number, since it uses less digits than its factorization.

50196721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20722.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 50196721 is about 7084.9644318091. The cubic root of 50196721 is about 368.8856685129.

The spelling of 50196721 in words is "fifty million, one hundred ninety-six thousand, seven hundred twenty-one".