53819521 has 4 divisors (see below), whose sum is σ = 61508032. Its totient is φ = 46131012.

The previous prime is 53819473. The next prime is 53819537. The reversal of 53819521 is 12591835.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12591835 = 5 ⋅2518367.

It is a cyclic number.

It is not a de Polignac number, because 53819521 - 2¹¹ = 53817473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53819581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3844245 + ... + 3844258.

It is an arithmetic number, because the mean of its divisors is an integer number (15377008).

Almost surely, 2^53819521 is an apocalyptic number.

It is an amenable number.

53819521 is a deficient number, since it is larger than the sum of its proper divisors (7688511).

53819521 is an equidigital number, since it uses as much as digits as its factorization.

53819521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688510.

The product of its digits is 10800, while the sum is 34.

The square root of 53819521 is about 7336.1789100321. The cubic root of 53819521 is about 377.5547536912.

The spelling of 53819521 in words is "fifty-three million, eight hundred nineteen thousand, five hundred twenty-one".