53072509 has 8 divisors (see below), whose sum is σ = 61560128. Its totient is φ = 44811360.

The previous prime is 53072497. The next prime is 53072519. The reversal of 53072509 is 90527035.

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 53072509 - 2⁷ = 53072381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53072519) 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, 56112 + ... + 57049.

It is an arithmetic number, because the mean of its divisors is an integer number (7695016).

Almost surely, 2^53072509 is an apocalyptic number.

It is an amenable number.

53072509 is a deficient number, since it is larger than the sum of its proper divisors (8487619).

53072509 is a wasteful number, since it uses less digits than its factorization.

53072509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113235.

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

The square root of 53072509 is about 7285.0881257539. The cubic root of 53072509 is about 375.7997958066.

The spelling of 53072509 in words is "fifty-three million, seventy-two thousand, five hundred nine".