52181531 has 2 divisors, whose sum is σ = 52181532. Its totient is φ = 52181530.

The previous prime is 52181509. The next prime is 52181593. The reversal of 52181531 is 13518125.

It is a happy number.

52181531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52181531 - 2¹⁰ = 52180507 is a prime.

It is a super-2 number, since 2×52181531² = 5445824355007922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52181531.

It is not a weakly prime, because it can be changed into another prime (52183531) 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 as a sum of consecutive naturals, namely, 26090765 + 26090766.

It is an arithmetic number, because the mean of its divisors is an integer number (26090766).

Almost surely, 2^52181531 is an apocalyptic number.

52181531 is a deficient number, since it is larger than the sum of its proper divisors (1).

52181531 is an equidigital number, since it uses as much as digits as its factorization.

52181531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 26.

The square root of 52181531 is about 7223.6784950605. The cubic root of 52181531 is about 373.6849487274.

Adding to 52181531 its reverse (13518125), we get a palindrome (65699656).

The spelling of 52181531 in words is "fifty-two million, one hundred eighty-one thousand, five hundred thirty-one".