52297721 has 8 divisors (see below), whose sum is σ = 60661440. Its totient is φ = 44157168.

The previous prime is 52297717. The next prime is 52297733. The reversal of 52297721 is 12779225.

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 52297721 - 2² = 52297717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52297771) 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, 55286 + ... + 56223.

It is an arithmetic number, because the mean of its divisors is an integer number (7582680).

Almost surely, 2^52297721 is an apocalyptic number.

It is an amenable number.

52297721 is a deficient number, since it is larger than the sum of its proper divisors (8363719).

52297721 is a wasteful number, since it uses less digits than its factorization.

52297721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111583.

The product of its digits is 17640, while the sum is 35.

The square root of 52297721 is about 7231.7163246355. The cubic root of 52297721 is about 373.9620983067.

The spelling of 52297721 in words is "fifty-two million, two hundred ninety-seven thousand, seven hundred twenty-one".