3540165221 has 16 divisors (see below), whose sum is σ = 3914987904. Its totient is φ = 3184118784.

The previous prime is 3540165203. The next prime is 3540165247. The reversal of 3540165221 is 1225610453.

It is a cyclic number.

It is not a de Polignac number, because 3540165221 - 2²² = 3535970917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3540165721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498125 + ... + 505181.

It is an arithmetic number, because the mean of its divisors is an integer number (244686744).

Almost surely, 2^3540165221 is an apocalyptic number.

It is an amenable number.

3540165221 is a deficient number, since it is larger than the sum of its proper divisors (374822683).

3540165221 is a wasteful number, since it uses less digits than its factorization.

3540165221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 3540165221 is about 59499.2875671634. The cubic root of 3540165221 is about 1524.0802797603.

Adding to 3540165221 its reverse (1225610453), we get a palindrome (4765775674).

The spelling of 3540165221 in words is "three billion, five hundred forty million, one hundred sixty-five thousand, two hundred twenty-one".