52121161 has 4 divisors (see below), whose sum is σ = 54864400. Its totient is φ = 49377924.

The previous prime is 52121143. The next prime is 52121177. The reversal of 52121161 is 16112125.

52121161 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 a de Polignac number, because none of the positive numbers 2^k-52121161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 2743219 = 52121161 / (5 + 2 + 1 + 2 + 1 + 1 + 6 + 1).

It is not an unprimeable number, because it can be changed into a prime (52121141) 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, 1371591 + ... + 1371628.

It is an arithmetic number, because the mean of its divisors is an integer number (13716100).

Almost surely, 2^52121161 is an apocalyptic number.

It is an amenable number.

52121161 is a deficient number, since it is larger than the sum of its proper divisors (2743239).

52121161 is a wasteful number, since it uses less digits than its factorization.

52121161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743238.

The product of its digits is 120, while the sum is 19.

The square root of 52121161 is about 7219.4986668051. The cubic root of 52121161 is about 373.5407849123.

Adding to 52121161 its reverse (16112125), we get a palindrome (68233286).

The spelling of 52121161 in words is "fifty-two million, one hundred twenty-one thousand, one hundred sixty-one".