49220221 has 8 divisors (see below), whose sum is σ = 50995800. Its totient is φ = 47449920.

The previous prime is 49220179. The next prime is 49220231. The reversal of 49220221 is 12202294.

It can be written as a sum of positive squares in 4 ways, for example, as 21288996 + 27931225 = 4614^2 + 5285^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49220221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49220192 and 49220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49220231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34951 + ... + 36331.

It is an arithmetic number, because the mean of its divisors is an integer number (6374475).

Almost surely, 2^49220221 is an apocalyptic number.

It is an amenable number.

49220221 is a deficient number, since it is larger than the sum of its proper divisors (1775579).

49220221 is a wasteful number, since it uses less digits than its factorization.

49220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 49220221 is about 7015.7124370943. The cubic root of 49220221 is about 366.4779531204.

The spelling of 49220221 in words is "forty-nine million, two hundred twenty thousand, two hundred twenty-one".