3572757473221 has 4 divisors (see below), whose sum is σ = 3578585789452. Its totient is φ = 3566929156992.

The previous prime is 3572757473191. The next prime is 3572757473231. The reversal of 3572757473221 is 1223747572753.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26639136225 + 3546118336996 = 163215^2 + 1883114^2 .

It is a cyclic number.

It is not a de Polignac number, because 3572757473221 - 2³⁷ = 3435318519749 is a prime.

It is a super-2 number, since 2×3572757473221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3572757473231) 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, 2914157196 + ... + 2914158421.

It is an arithmetic number, because the mean of its divisors is an integer number (894646447363).

Almost surely, 2^{3572757473221} is an apocalyptic number.

It is an amenable number.

3572757473221 is a deficient number, since it is larger than the sum of its proper divisors (5828316231).

3572757473221 is an equidigital number, since it uses as much as digits as its factorization.

3572757473221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828316230.

The product of its digits is 17287200, while the sum is 55.

The spelling of 3572757473221 in words is "three trillion, five hundred seventy-two billion, seven hundred fifty-seven million, four hundred seventy-three thousand, two hundred twenty-one".