52115531 has 4 divisors (see below), whose sum is σ = 56124432. Its totient is φ = 48106632.

The previous prime is 52115521. The next prime is 52115549. The reversal of 52115531 is 13551125.

It is a happy number.

52115531 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 52115531 - 2¹⁴ = 52099147 is a prime.

It is a super-2 number, since 2×52115531² = 5432057142823922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52115497 and 52115506.

It is not an unprimeable number, because it can be changed into a prime (52115521) 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, 2004431 + ... + 2004456.

It is an arithmetic number, because the mean of its divisors is an integer number (14031108).

Almost surely, 2^52115531 is an apocalyptic number.

52115531 is a deficient number, since it is larger than the sum of its proper divisors (4008901).

52115531 is a wasteful number, since it uses less digits than its factorization.

52115531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008900.

The product of its digits is 750, while the sum is 23.

The square root of 52115531 is about 7219.1087400039. The cubic root of 52115531 is about 373.5273347748.

Adding to 52115531 its reverse (13551125), we get a palindrome (65666656).

The spelling of 52115531 in words is "fifty-two million, one hundred fifteen thousand, five hundred thirty-one".