3720528181 has 2 divisors, whose sum is σ = 3720528182. Its totient is φ = 3720528180.

The previous prime is 3720528179. The next prime is 3720528241. The reversal of 3720528181 is 1818250273.

3720528181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2056622500 + 1663905681 = 45350^2 + 40791^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720528181 - 2¹ = 3720528179 is a prime.

It is a super-2 number, since 2×3720528181² = 27684659891230337522, which contains 22 as substring.

Together with 3720528179, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3720528181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3720528121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860264090 + 1860264091.

It is an arithmetic number, because the mean of its divisors is an integer number (1860264091).

Almost surely, 2^3720528181 is an apocalyptic number.

It is an amenable number.

3720528181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720528181 is an equidigital number, since it uses as much as digits as its factorization.

3720528181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 3720528181 is about 60996.1325085452. The cubic root of 3720528181 is about 1549.5355085469.

The spelling of 3720528181 in words is "three billion, seven hundred twenty million, five hundred twenty-eight thousand, one hundred eighty-one".