49790221 has 4 divisors (see below), whose sum is σ = 53620252. Its totient is φ = 45960192.

The previous prime is 49790201. The next prime is 49790231. The reversal of 49790221 is 12209794.

49790221 = 4989² + 4990².

It is a happy number.

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 24890121 + 24900100 = 4989^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 49790221 - 2²¹ = 47693069 is a prime.

It is a super-2 number, since 2×49790221² = 4958132214457682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49790201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914996 + ... + 1915021.

It is an arithmetic number, because the mean of its divisors is an integer number (13405063).

Almost surely, 2^49790221 is an apocalyptic number.

49790221 is the 4990-th centered square number.

It is an amenable number.

49790221 is a deficient number, since it is larger than the sum of its proper divisors (3830031).

49790221 is a wasteful number, since it uses less digits than its factorization.

49790221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830030.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 49790221 is about 7056.2186048903. The cubic root of 49790221 is about 367.8872059995.

The spelling of 49790221 in words is "forty-nine million, seven hundred ninety thousand, two hundred twenty-one".