52157609 has 8 divisors (see below), whose sum is σ = 60825600. Its totient is φ = 44706228.

The previous prime is 52157591. The next prime is 52157627. The reversal of 52157609 is 90675125.

It is an interprime number because it is at equal distance from previous prime (52157591) and next prime (52157627).

It is a de Polignac number, because none of the positive numbers 2^k-52157609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52157659) 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, 75689 + ... + 76374.

It is an arithmetic number, because the mean of its divisors is an integer number (7603200).

Almost surely, 2^52157609 is an apocalyptic number.

It is an amenable number.

52157609 is a deficient number, since it is larger than the sum of its proper divisors (8667991).

52157609 is an equidigital number, since it uses as much as digits as its factorization.

52157609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152084 (or 152070 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 52157609 is about 7222.0225006573. The cubic root of 52157609 is about 373.6278361976.

The spelling of 52157609 in words is "fifty-two million, one hundred fifty-seven thousand, six hundred nine".