52101815 has 4 divisors (see below), whose sum is σ = 62522184. Its totient is φ = 41681448.

The previous prime is 52101811. The next prime is 52101817. The reversal of 52101815 is 51810125.

52101815 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 is a cyclic number.

It is not a de Polignac number, because 52101815 - 2² = 52101811 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 (52101811) 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, 5210177 + ... + 5210186.

It is an arithmetic number, because the mean of its divisors is an integer number (15630546).

Almost surely, 2^52101815 is an apocalyptic number.

52101815 is a deficient number, since it is larger than the sum of its proper divisors (10420369).

52101815 is a wasteful number, since it uses less digits than its factorization.

52101815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420368.

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

The square root of 52101815 is about 7218.1586987264. The cubic root of 52101815 is about 373.4945630312.

The spelling of 52101815 in words is "fifty-two million, one hundred one thousand, eight hundred fifteen".