53641221 has 16 divisors (see below), whose sum is σ = 74805120. Its totient is φ = 34126400.

The previous prime is 53641193. The next prime is 53641223. The reversal of 53641221 is 12214635.

It is a cyclic number.

It is not a de Polignac number, because 53641221 - 2¹⁵ = 53608453 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53641191 and 53641200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53641223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47815 + ... + 48923.

It is an arithmetic number, because the mean of its divisors is an integer number (4675320).

Almost surely, 2^53641221 is an apocalyptic number.

It is an amenable number.

53641221 is a deficient number, since it is larger than the sum of its proper divisors (21163899).

53641221 is a wasteful number, since it uses less digits than its factorization.

53641221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836.

The product of its digits is 1440, while the sum is 24.

The square root of 53641221 is about 7324.0167258138. The cubic root of 53641221 is about 377.1373556401.

Adding to 53641221 its reverse (12214635), we get a palindrome (65855856).

The spelling of 53641221 in words is "fifty-three million, six hundred forty-one thousand, two hundred twenty-one".