48405521 has 4 divisors (see below), whose sum is σ = 50953200. Its totient is φ = 45857844.

The previous prime is 48405491. The next prime is 48405523. The reversal of 48405521 is 12550484.

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 48405521 - 2¹⁸ = 48143377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48405523) 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, 1273811 + ... + 1273848.

It is an arithmetic number, because the mean of its divisors is an integer number (12738300).

Almost surely, 2^48405521 is an apocalyptic number.

It is an amenable number.

48405521 is a deficient number, since it is larger than the sum of its proper divisors (2547679).

48405521 is a wasteful number, since it uses less digits than its factorization.

48405521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547678.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 48405521 is about 6957.4076350319. The cubic root of 48405521 is about 364.4446950977. Note that the first 3 decimals are identical.

The spelling of 48405521 in words is "forty-eight million, four hundred five thousand, five hundred twenty-one".