52015421111 has 4 divisors (see below), whose sum is σ = 52062838272. Its totient is φ = 51968003952.

The previous prime is 52015421099. The next prime is 52015421131. The reversal of 52015421111 is 11112451025.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52015421111 - 2⁶ = 52015421047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52015421131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23706935 + ... + 23709128.

It is an arithmetic number, because the mean of its divisors is an integer number (13015709568).

Almost surely, 2^52015421111 is an apocalyptic number.

52015421111 is a deficient number, since it is larger than the sum of its proper divisors (47417161).

52015421111 is a wasteful number, since it uses less digits than its factorization.

52015421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47417160.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 52015421111 its reverse (11112451025), we get a palindrome (63127872136).

The spelling of 52015421111 in words is "fifty-two billion, fifteen million, four hundred twenty-one thousand, one hundred eleven".