49975521 has 4 divisors (see below), whose sum is σ = 66634032. Its totient is φ = 33317012.

The previous prime is 49975517. The next prime is 49975553. The reversal of 49975521 is 12557994.

49975521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 49975521 - 2² = 49975517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49975511) 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 3 ways as a sum of consecutive naturals, for example, 8329251 + ... + 8329256.

It is an arithmetic number, because the mean of its divisors is an integer number (16658508).

Almost surely, 2^49975521 is an apocalyptic number.

It is an amenable number.

49975521 is a deficient number, since it is larger than the sum of its proper divisors (16658511).

49975521 is a wasteful number, since it uses less digits than its factorization.

49975521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16658510.

The product of its digits is 113400, while the sum is 42.

The square root of 49975521 is about 7069.3366732672. The cubic root of 49975521 is about 368.3430191120.

The spelling of 49975521 in words is "forty-nine million, nine hundred seventy-five thousand, five hundred twenty-one".