48318721 has 4 divisors (see below), whose sum is σ = 52711344. Its totient is φ = 43926100.

The previous prime is 48318689. The next prime is 48318737. The reversal of 48318721 is 12781384.

It is a happy number.

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 48318721 - 2⁵ = 48318689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48318761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196295 + ... + 2196316.

It is an arithmetic number, because the mean of its divisors is an integer number (13177836).

Almost surely, 2^48318721 is an apocalyptic number.

It is an amenable number.

48318721 is a deficient number, since it is larger than the sum of its proper divisors (4392623).

48318721 is a wasteful number, since it uses less digits than its factorization.

48318721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392622.

The product of its digits is 10752, while the sum is 34.

The square root of 48318721 is about 6951.1668804597. The cubic root of 48318721 is about 364.2267259752.

The spelling of 48318721 in words is "forty-eight million, three hundred eighteen thousand, seven hundred twenty-one".