53243661 has 8 divisors (see below), whose sum is σ = 71102880. Its totient is φ = 35440112.

The previous prime is 53243651. The next prime is 53243669. The reversal of 53243661 is 16634235.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53243661 - 2¹⁵ = 53210893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53243669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11631 + ... + 15548.

It is an arithmetic number, because the mean of its divisors is an integer number (8887860).

Almost surely, 2^53243661 is an apocalyptic number.

It is an amenable number.

53243661 is a deficient number, since it is larger than the sum of its proper divisors (17859219).

53243661 is a wasteful number, since it uses less digits than its factorization.

53243661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27835.

The product of its digits is 12960, while the sum is 30.

The square root of 53243661 is about 7296.8254056130. The cubic root of 53243661 is about 376.2033309665.

Adding to 53243661 its reverse (16634235), we get a palindrome (69877896).

The spelling of 53243661 in words is "fifty-three million, two hundred forty-three thousand, six hundred sixty-one".