52610721 has 4 divisors (see below), whose sum is σ = 70147632. Its totient is φ = 35073812.

The previous prime is 52610717. The next prime is 52610737. The reversal of 52610721 is 12701625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52610721 - 2² = 52610717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52610691 and 52610700.

It is not an unprimeable number, because it can be changed into a prime (52610711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8768451 + ... + 8768456.

It is an arithmetic number, because the mean of its divisors is an integer number (17536908).

Almost surely, 2^52610721 is an apocalyptic number.

It is an amenable number.

52610721 is a deficient number, since it is larger than the sum of its proper divisors (17536911).

52610721 is a wasteful number, since it uses less digits than its factorization.

52610721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17536910.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 52610721 is about 7253.3248238308. The cubic root of 52610721 is about 374.7066648273.

The spelling of 52610721 in words is "fifty-two million, six hundred ten thousand, seven hundred twenty-one".