52155012221 has 16 divisors (see below), whose sum is σ = 58618350336. Its totient is φ = 46042546176.

The previous prime is 52155012109. The next prime is 52155012241. The reversal of 52155012221 is 12221055125.

It is a happy number.

52155012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52155012221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52155012241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2820221 + ... + 2838653.

It is an arithmetic number, because the mean of its divisors is an integer number (3663646896).

Almost surely, 2^52155012221 is an apocalyptic number.

It is an amenable number.

52155012221 is a deficient number, since it is larger than the sum of its proper divisors (6463338115).

52155012221 is a wasteful number, since it uses less digits than its factorization.

52155012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27932.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 52155012221 its reverse (12221055125), we get a palindrome (64376067346).

The spelling of 52155012221 in words is "fifty-two billion, one hundred fifty-five million, twelve thousand, two hundred twenty-one".