25532161 has 2 divisors, whose sum is σ = 25532162. Its totient is φ = 25532160.

The previous prime is 25532149. The next prime is 25532281. The reversal of 25532161 is 16123552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 970225 = 4956^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 25532161 - 2⁷ = 25532033 is a prime.

It is not a weakly prime, because it can be changed into another prime (25532141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766080 + 12766081.

It is an arithmetic number, because the mean of its divisors is an integer number (12766081).

Almost surely, 2^25532161 is an apocalyptic number.

It is an amenable number.

25532161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25532161 is an equidigital number, since it uses as much as digits as its factorization.

25532161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 25532161 is about 5052.9358792686. The cubic root of 25532161 is about 294.4619552051.

The spelling of 25532161 in words is "twenty-five million, five hundred thirty-two thousand, one hundred sixty-one".