52736721 has 8 divisors (see below), whose sum is σ = 70998720. Its totient is φ = 34816272.

The previous prime is 52736711. The next prime is 52736731. The reversal of 52736721 is 12763725.

It is an interprime number because it is at equal distance from previous prime (52736711) and next prime (52736731).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52736721 - 2¹⁵ = 52703953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52736711) 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, 85026 + ... + 85643.

It is an arithmetic number, because the mean of its divisors is an integer number (8874840).

Almost surely, 2^52736721 is an apocalyptic number.

It is an amenable number.

52736721 is a deficient number, since it is larger than the sum of its proper divisors (18261999).

52736721 is a wasteful number, since it uses less digits than its factorization.

52736721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170775.

The product of its digits is 17640, while the sum is 33.

The square root of 52736721 is about 7262.0053015679. The cubic root of 52736721 is about 375.0055608064.

The spelling of 52736721 in words is "fifty-two million, seven hundred thirty-six thousand, seven hundred twenty-one".