53155209 has 8 divisors (see below), whose sum is σ = 75042720. Its totient is φ = 33352256.

The previous prime is 53155183. The next prime is 53155213. The reversal of 53155209 is 90255135.

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 53155209 - 2⁵ = 53155177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53155259) 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, 521079 + ... + 521180.

It is an arithmetic number, because the mean of its divisors is an integer number (9380340).

Almost surely, 2^53155209 is an apocalyptic number.

It is an amenable number.

53155209 is a deficient number, since it is larger than the sum of its proper divisors (21887511).

53155209 is a wasteful number, since it uses less digits than its factorization.

53155209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042279.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 53155209 is about 7290.7618943427. The cubic root of 53155209 is about 375.9948906239.

The spelling of 53155209 in words is "fifty-three million, one hundred fifty-five thousand, two hundred nine".