53511521 has 8 divisors (see below), whose sum is σ = 62457600. Its totient is φ = 44890848.

The previous prime is 53511481. The next prime is 53511527. The reversal of 53511521 is 12511535.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53511521 - 2¹⁴ = 53495137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53511527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80996 + ... + 81653.

It is an arithmetic number, because the mean of its divisors is an integer number (7807200).

Almost surely, 2^53511521 is an apocalyptic number.

It is an amenable number.

53511521 is a deficient number, since it is larger than the sum of its proper divisors (8946079).

53511521 is a wasteful number, since it uses less digits than its factorization.

53511521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162703.

The product of its digits is 750, while the sum is 23.

The square root of 53511521 is about 7315.1569361156. The cubic root of 53511521 is about 376.8331480981.

The spelling of 53511521 in words is "fifty-three million, five hundred eleven thousand, five hundred twenty-one".