53959521 has 16 divisors (see below), whose sum is σ = 89699328. Its totient is φ = 28030800.

The previous prime is 53959501. The next prime is 53959523. The reversal of 53959521 is 12595935.

It is not a de Polignac number, because 53959521 - 2⁶ = 53959457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53959521.

It is not an unprimeable number, because it can be changed into a prime (53959523) 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, 116565 + ... + 117026.

It is an arithmetic number, because the mean of its divisors is an integer number (5606208).

Almost surely, 2^53959521 is an apocalyptic number.

It is an amenable number.

53959521 is a deficient number, since it is larger than the sum of its proper divisors (35739807).

53959521 is a wasteful number, since it uses less digits than its factorization.

53959521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233612.

The product of its digits is 60750, while the sum is 39.

The square root of 53959521 is about 7345.7144649108. The cubic root of 53959521 is about 377.8818462778.

The spelling of 53959521 in words is "fifty-three million, nine hundred fifty-nine thousand, five hundred twenty-one".