53221544 has 16 divisors (see below), whose sum is σ = 103009920. Its totient is φ = 25752240.

The previous prime is 53221541. The next prime is 53221559. The reversal of 53221544 is 44512235.

It is a happy number.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (53221541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107054 + ... + 107549.

It is an arithmetic number, because the mean of its divisors is an integer number (6438120).

Almost surely, 2^53221544 is an apocalyptic number.

It is an amenable number.

53221544 is a deficient number, since it is larger than the sum of its proper divisors (49788376).

53221544 is a wasteful number, since it uses less digits than its factorization.

53221544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214640 (or 214636 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 53221544 is about 7295.3097261186. The cubic root of 53221544 is about 376.1512331125.

Adding to 53221544 its reverse (44512235), we get a palindrome (97733779).

The spelling of 53221544 in words is "fifty-three million, two hundred twenty-one thousand, five hundred forty-four".