53507209 has 8 divisors (see below), whose sum is σ = 63123968. Its totient is φ = 44383680.

The previous prime is 53507203. The next prime is 53507213. The reversal of 53507209 is 90270535.

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 53507209 - 2¹⁵ = 53474441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53507203) 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 7 ways as a sum of consecutive naturals, for example, 123072 + ... + 123505.

It is an arithmetic number, because the mean of its divisors is an integer number (7890496).

Almost surely, 2^53507209 is an apocalyptic number.

It is an amenable number.

53507209 is a deficient number, since it is larger than the sum of its proper divisors (9616759).

53507209 is a wasteful number, since it uses less digits than its factorization.

53507209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246615.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 53507209 is about 7314.8621996590. The cubic root of 53507209 is about 376.8230259901.

The spelling of 53507209 in words is "fifty-three million, five hundred seven thousand, two hundred nine".