52657509 has 16 divisors (see below), whose sum is σ = 71184960. Its totient is φ = 34621440.

The previous prime is 52657481. The next prime is 52657513. The reversal of 52657509 is 90575625.

It is not a de Polignac number, because 52657509 - 2¹¹ = 52655461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52657009) 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, 81829 + ... + 82469.

It is an arithmetic number, because the mean of its divisors is an integer number (4449060).

Almost surely, 2^52657509 is an apocalyptic number.

It is an amenable number.

52657509 is a deficient number, since it is larger than the sum of its proper divisors (18527451).

52657509 is a wasteful number, since it uses less digits than its factorization.

52657509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 52657509 is about 7256.5493865886. The cubic root of 52657509 is about 374.8177105136.

The spelling of 52657509 in words is "fifty-two million, six hundred fifty-seven thousand, five hundred nine".