49557221 has 4 divisors (see below), whose sum is σ = 56636832. Its totient is φ = 42477612.

The previous prime is 49557197. The next prime is 49557241. The reversal of 49557221 is 12275594.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12275594 = 2 ⋅6137797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49557221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49557241) 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, 3539795 + ... + 3539808.

It is an arithmetic number, because the mean of its divisors is an integer number (14159208).

Almost surely, 2^49557221 is an apocalyptic number.

It is an amenable number.

49557221 is a deficient number, since it is larger than the sum of its proper divisors (7079611).

49557221 is an equidigital number, since it uses as much as digits as its factorization.

49557221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079610.

The product of its digits is 25200, while the sum is 35.

The square root of 49557221 is about 7039.6889846072. The cubic root of 49557221 is about 367.3124493829.

The spelling of 49557221 in words is "forty-nine million, five hundred fifty-seven thousand, two hundred twenty-one".