49405221 has 20 divisors (see below), whose sum is σ = 74052000. Its totient is φ = 32825736.

The previous prime is 49405207. The next prime is 49405267. The reversal of 49405221 is 12250494.

It is not a de Polignac number, because 49405221 - 2⁶ = 49405157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49405721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28230 + ... + 29928.

It is an arithmetic number, because the mean of its divisors is an integer number (3702600).

Almost surely, 2^49405221 is an apocalyptic number.

It is an amenable number.

49405221 is a deficient number, since it is larger than the sum of its proper divisors (24646779).

49405221 is a wasteful number, since it uses less digits than its factorization.

49405221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2061 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 49405221 is about 7028.8847621796. The cubic root of 49405221 is about 366.9365292509.

The spelling of 49405221 in words is "forty-nine million, four hundred five thousand, two hundred twenty-one".