3546225721 has 32 divisors (see below), whose sum is σ = 4136520960. Its totient is φ = 3015530496.

The previous prime is 3546225703. The next prime is 3546225773. The reversal of 3546225721 is 1275226453.

It is a cyclic number.

It is not a de Polignac number, because 3546225721 - 2⁷ = 3546225593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3546222721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4137525 + ... + 4138381.

It is an arithmetic number, because the mean of its divisors is an integer number (129266280).

Almost surely, 2^3546225721 is an apocalyptic number.

It is an amenable number.

3546225721 is a deficient number, since it is larger than the sum of its proper divisors (590295239).

3546225721 is a wasteful number, since it uses less digits than its factorization.

3546225721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 100800, while the sum is 37.

The square root of 3546225721 is about 59550.1949702938. The cubic root of 3546225721 is about 1524.9494880340.

The spelling of 3546225721 in words is "three billion, five hundred forty-six million, two hundred twenty-five thousand, seven hundred twenty-one".