48117721 has 4 divisors (see below), whose sum is σ = 48157200. Its totient is φ = 48078244.

The previous prime is 48117697. The next prime is 48117739. The reversal of 48117721 is 12771184.

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 a de Polignac number, because none of the positive numbers 2^k-48117721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48117781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17851 + ... + 20368.

It is an arithmetic number, because the mean of its divisors is an integer number (12039300).

Almost surely, 2^48117721 is an apocalyptic number.

It is an amenable number.

48117721 is a deficient number, since it is larger than the sum of its proper divisors (39479).

48117721 is a wasteful number, since it uses less digits than its factorization.

48117721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39478.

The product of its digits is 3136, while the sum is 31.

The square root of 48117721 is about 6936.6938090131. The cubic root of 48117721 is about 363.7209777548.

The spelling of 48117721 in words is "forty-eight million, one hundred seventeen thousand, seven hundred twenty-one".