3543757221 has 4 divisors (see below), whose sum is σ = 4725009632. Its totient is φ = 2362504812.

The previous prime is 3543757199. The next prime is 3543757247. The reversal of 3543757221 is 1227573453.

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: 1227573453 = 3 ⋅409191151.

It is not a de Polignac number, because 3543757221 - 2⁷ = 3543757093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3543757221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3543757271) 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, 590626201 + ... + 590626206.

It is an arithmetic number, because the mean of its divisors is an integer number (1181252408).

Almost surely, 2^3543757221 is an apocalyptic number.

It is an amenable number.

3543757221 is a deficient number, since it is larger than the sum of its proper divisors (1181252411).

3543757221 is a wasteful number, since it uses less digits than its factorization.

3543757221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181252410.

The product of its digits is 176400, while the sum is 39.

The square root of 3543757221 is about 59529.4651496215. The cubic root of 3543757221 is about 1524.5955707628.

The spelling of 3543757221 in words is "three billion, five hundred forty-three million, seven hundred fifty-seven thousand, two hundred twenty-one".