53620221 has 8 divisors (see below), whose sum is σ = 71537760. Its totient is φ = 35724752.

The previous prime is 53620211. The next prime is 53620243. The reversal of 53620221 is 12202635.

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 53620221 - 2¹⁵ = 53587453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53620201) 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, 1390 + ... + 10448.

It is an arithmetic number, because the mean of its divisors is an integer number (8942220).

Almost surely, 2^53620221 is an apocalyptic number.

It is an amenable number.

53620221 is a deficient number, since it is larger than the sum of its proper divisors (17917539).

53620221 is a wasteful number, since it uses less digits than its factorization.

53620221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11035.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 53620221 is about 7322.5829459283. The cubic root of 53620221 is about 377.0881340523.

Adding to 53620221 its reverse (12202635), we get a palindrome (65822856).

The spelling of 53620221 in words is "fifty-three million, six hundred twenty thousand, two hundred twenty-one".