48991521 has 8 divisors (see below), whose sum is σ = 65414080. Its totient is φ = 32614992.

The previous prime is 48991517. The next prime is 48991543. The reversal of 48991521 is 12519984.

48991521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 48991521 - 2² = 48991517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 48991521.

It is not an unprimeable number, because it can be changed into a prime (48991571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8941 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (8176760).

Almost surely, 2^48991521 is an apocalyptic number.

It is an amenable number.

48991521 is a deficient number, since it is larger than the sum of its proper divisors (16422559).

48991521 is a wasteful number, since it uses less digits than its factorization.

48991521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23015.

The product of its digits is 25920, while the sum is 39.

The square root of 48991521 is about 6999.3943309404. The cubic root of 48991521 is about 365.9094628098.

The spelling of 48991521 in words is "forty-eight million, nine hundred ninety-one thousand, five hundred twenty-one".