50721101 has 4 divisors (see below), whose sum is σ = 50931804. Its totient is φ = 50510400.

The previous prime is 50721091. The next prime is 50721109. The reversal of 50721101 is 10112705.

50721101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 24700900 + 26020201 = 4970^2 + 5101^2 .

It is a cyclic number.

It is not a de Polignac number, because 50721101 - 2¹⁸ = 50458957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50721101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50721109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104990 + ... + 105471.

It is an arithmetic number, because the mean of its divisors is an integer number (12732951).

Almost surely, 2^50721101 is an apocalyptic number.

It is an amenable number.

50721101 is a deficient number, since it is larger than the sum of its proper divisors (210703).

50721101 is a wasteful number, since it uses less digits than its factorization.

50721101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210702.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 50721101 is about 7121.8748233874. The cubic root of 50721101 is about 370.1657426420.

Adding to 50721101 its reverse (10112705), we get a palindrome (60833806).

The spelling of 50721101 in words is "fifty million, seven hundred twenty-one thousand, one hundred one".