53343521 has 16 divisors (see below), whose sum is σ = 68057088. Its totient is φ = 40597200.

The previous prime is 53343497. The next prime is 53343527. The reversal of 53343521 is 12534335.

It is not a de Polignac number, because 53343521 - 2¹⁴ = 53327137 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (53343527) 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, 4745 + ... + 11366.

It is an arithmetic number, because the mean of its divisors is an integer number (4253568).

Almost surely, 2^53343521 is an apocalyptic number.

It is an amenable number.

53343521 is a deficient number, since it is larger than the sum of its proper divisors (14713567).

53343521 is a wasteful number, since it uses less digits than its factorization.

53343521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16172.

The product of its digits is 5400, while the sum is 26.

The square root of 53343521 is about 7303.6649019516. The cubic root of 53343521 is about 376.4383774300.

Adding to 53343521 its reverse (12534335), we get a palindrome (65877856).

The spelling of 53343521 in words is "fifty-three million, three hundred forty-three thousand, five hundred twenty-one".