53451521 has 4 divisors (see below), whose sum is σ = 53508912. Its totient is φ = 53394132.

The previous prime is 53451499. The next prime is 53451527. The reversal of 53451521 is 12515435.

53451521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53451521 - 2⁶ = 53451457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53451527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27275 + ... + 29168.

It is an arithmetic number, because the mean of its divisors is an integer number (13377228).

Almost surely, 2^53451521 is an apocalyptic number.

It is an amenable number.

53451521 is a deficient number, since it is larger than the sum of its proper divisors (57391).

53451521 is an equidigital number, since it uses as much as digits as its factorization.

53451521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57390.

The product of its digits is 3000, while the sum is 26.

The square root of 53451521 is about 7311.0547118730. The cubic root of 53451521 is about 376.6922535503.

Adding to 53451521 its reverse (12515435), we get a palindrome (65966956).

The spelling of 53451521 in words is "fifty-three million, four hundred fifty-one thousand, five hundred twenty-one".