49136221 has 4 divisors (see below), whose sum is σ = 49150332. Its totient is φ = 49122112.

The previous prime is 49136207. The next prime is 49136267. The reversal of 49136221 is 12263194.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12263194 = 2 ⋅6131597.

It can be written as a sum of positive squares in 2 ways, for example, as 25613721 + 23522500 = 5061^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 49136221 - 2⁷ = 49136093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49136221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49136201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2331 + ... + 10183.

It is an arithmetic number, because the mean of its divisors is an integer number (12287583).

Almost surely, 2^49136221 is an apocalyptic number.

It is an amenable number.

49136221 is a deficient number, since it is larger than the sum of its proper divisors (14111).

49136221 is an equidigital number, since it uses as much as digits as its factorization.

49136221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14110.

The product of its digits is 2592, while the sum is 28.

The square root of 49136221 is about 7009.7233183629. The cubic root of 49136221 is about 366.2693554052.

The spelling of 49136221 in words is "forty-nine million, one hundred thirty-six thousand, two hundred twenty-one".