4252181993 has 2 divisors, whose sum is σ = 4252181994. Its totient is φ = 4252181992.

The previous prime is 4252181963. The next prime is 4252182019. The reversal of 4252181993 is 3991812524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4242177424 + 10004569 = 65132^2 + 3163^2 .

It is a cyclic number.

It is not a de Polignac number, because 4252181993 - 2⁸ = 4252181737 is a prime.

It is not a weakly prime, because it can be changed into another prime (4252181953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2126090996 + 2126090997.

It is an arithmetic number, because the mean of its divisors is an integer number (2126090997).

Almost surely, 2^4252181993 is an apocalyptic number.

It is an amenable number.

4252181993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4252181993 is an equidigital number, since it uses as much as digits as its factorization.

4252181993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 4252181993 is about 65208.7570269515. The cubic root of 4252181993 is about 1620.0830614578.

The spelling of 4252181993 in words is "four billion, two hundred fifty-two million, one hundred eighty-one thousand, nine hundred ninety-three".