252666181 has 2 divisors, whose sum is σ = 252666182. Its totient is φ = 252666180.

The previous prime is 252666133. The next prime is 252666187. The reversal of 252666181 is 181666252.

252666181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241336225 + 11329956 = 15535^2 + 3366^2 .

It is a cyclic number.

It is not a de Polignac number, because 252666181 - 2⁹ = 252665669 is a prime.

It is a super-2 number, since 2×252666181² = 127680398042249522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252666181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252666187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126333090 + 126333091.

It is an arithmetic number, because the mean of its divisors is an integer number (126333091).

Almost surely, 2^252666181 is an apocalyptic number.

It is an amenable number.

252666181 is a deficient number, since it is larger than the sum of its proper divisors (1).

252666181 is an equidigital number, since it uses as much as digits as its factorization.

252666181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 252666181 is about 15895.4767465465. The cubic root of 252666181 is about 632.1920624477.

The spelling of 252666181 in words is "two hundred fifty-two million, six hundred sixty-six thousand, one hundred eighty-one".