50781121 has 4 divisors (see below), whose sum is σ = 51424000. Its totient is φ = 50138244.

The previous prime is 50781119. The next prime is 50781127. The reversal of 50781121 is 12118705.

50781121 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, 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 50781121 - 2¹ = 50781119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50781127) 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, 321321 + ... + 321478.

It is an arithmetic number, because the mean of its divisors is an integer number (12856000).

Almost surely, 2^50781121 is an apocalyptic number.

It is an amenable number.

50781121 is a deficient number, since it is larger than the sum of its proper divisors (642879).

50781121 is an equidigital number, since it uses as much as digits as its factorization.

50781121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642878.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 50781121 is about 7126.0873556251. The cubic root of 50781121 is about 370.3116949818.

Adding to 50781121 its reverse (12118705), we get a palindrome (62899826).

The spelling of 50781121 in words is "fifty million, seven hundred eighty-one thousand, one hundred twenty-one".