25252181 has 2 divisors, whose sum is σ = 25252182. Its totient is φ = 25252180.

The previous prime is 25252147. The next prime is 25252189. The reversal of 25252181 is 18125252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24850225 + 401956 = 4985^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 25252181 - 2¹⁸ = 24990037 is a prime.

It is a super-2 number, since 2×25252181² = 1275345290513522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_1580633 and since 25252181 and 1580633 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25252181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25252189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12626090 + 12626091.

It is an arithmetic number, because the mean of its divisors is an integer number (12626091).

Almost surely, 2^25252181 is an apocalyptic number.

It is an amenable number.

25252181 is a deficient number, since it is larger than the sum of its proper divisors (1).

25252181 is an equidigital number, since it uses as much as digits as its factorization.

25252181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 26.

The square root of 25252181 is about 5025.1548234855. The cubic root of 25252181 is about 293.3816620038.

The spelling of 25252181 in words is "twenty-five million, two hundred fifty-two thousand, one hundred eighty-one".