52181830 has 16 divisors (see below), whose sum is σ = 94289184. Its totient is φ = 20792320.

The previous prime is 52181821. The next prime is 52181837. The reversal of 52181830 is 3818125.

52181830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52181837) 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 7 ways as a sum of consecutive naturals, for example, 7291 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (5893074).

Almost surely, 2^52181830 is an apocalyptic number.

52181830 is a deficient number, since it is larger than the sum of its proper divisors (42107354).

52181830 is a wasteful number, since it uses less digits than its factorization.

52181830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 52181830 is about 7223.6991908578. The cubic root of 52181830 is about 373.6856624639.

Adding to 52181830 its reverse (3818125), we get a palindrome (55999955).

The spelling of 52181830 in words is "fifty-two million, one hundred eighty-one thousand, eight hundred thirty".