49581221 has 4 divisors (see below), whose sum is σ = 50921292. Its totient is φ = 48241152.

The previous prime is 49581209. The next prime is 49581223. The reversal of 49581221 is 12218594.

49581221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 34456900 + 15124321 = 5870^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 49581221 - 2²² = 45386917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49581223) 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, 669980 + ... + 670053.

It is an arithmetic number, because the mean of its divisors is an integer number (12730323).

Almost surely, 2^49581221 is an apocalyptic number.

It is an amenable number.

49581221 is a deficient number, since it is larger than the sum of its proper divisors (1340071).

49581221 is a wasteful number, since it uses less digits than its factorization.

49581221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340070.

The product of its digits is 5760, while the sum is 32.

The square root of 49581221 is about 7041.3933990369. The cubic root of 49581221 is about 367.3717348977.

The spelling of 49581221 in words is "forty-nine million, five hundred eighty-one thousand, two hundred twenty-one".