52181644 has 12 divisors (see below), whose sum is σ = 91846944. Its totient is φ = 25939664.

The previous prime is 52181629. The next prime is 52181651. The reversal of 52181644 is 44618125.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37012 + ... + 38395.

It is an arithmetic number, because the mean of its divisors is an integer number (7653912).

Almost surely, 2^52181644 is an apocalyptic number.

It is an amenable number.

52181644 is a deficient number, since it is larger than the sum of its proper divisors (39665300).

52181644 is a wasteful number, since it uses less digits than its factorization.

52181644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75584 (or 75582 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 52181644 is about 7223.6863165561. The cubic root of 52181644 is about 373.6852184676.

Adding to 52181644 its reverse (44618125), we get a palindrome (96799769).

It can be divided in two parts, 52181 and 644, that added together give a palindrome (52825).

The spelling of 52181644 in words is "fifty-two million, one hundred eighty-one thousand, six hundred forty-four".