53548509 has 16 divisors (see below), whose sum is σ = 83804288. Its totient is φ = 29771712.

The previous prime is 53548507. The next prime is 53548543. The reversal of 53548509 is 90584535.

It is not a de Polignac number, because 53548509 - 2¹ = 53548507 is a prime.

It is a super-2 number, since 2×53548509² = 5734885632246162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53548507) 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, 33682 + ... + 35235.

It is an arithmetic number, because the mean of its divisors is an integer number (5237768).

Almost surely, 2^53548509 is an apocalyptic number.

It is an amenable number.

53548509 is a deficient number, since it is larger than the sum of its proper divisors (30255779).

53548509 is a wasteful number, since it uses less digits than its factorization.

53548509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68964.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 53548509 is about 7317.6846748135. The cubic root of 53548509 is about 376.9199524223.

The spelling of 53548509 in words is "fifty-three million, five hundred forty-eight thousand, five hundred nine".