52115391 has 6 divisors (see below), whose sum is σ = 75277800. Its totient is φ = 34743588.

The previous prime is 52115383. The next prime is 52115417. The reversal of 52115391 is 19351125.

52115391 is a `hidden beast` number, since 521 + 1 + 53 + 91 = 666.

It is not a de Polignac number, because 52115391 - 2³ = 52115383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52115311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2895291 + ... + 2895308.

It is an arithmetic number, because the mean of its divisors is an integer number (12546300).

Almost surely, 2^52115391 is an apocalyptic number.

52115391 is a deficient number, since it is larger than the sum of its proper divisors (23162409).

52115391 is a wasteful number, since it uses less digits than its factorization.

52115391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790605 (or 5790602 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 52115391 is about 7219.0990435095. The cubic root of 52115391 is about 373.5270003008.

The spelling of 52115391 in words is "fifty-two million, one hundred fifteen thousand, three hundred ninety-one".