25552081 has 2 divisors, whose sum is σ = 25552082. Its totient is φ = 25552080.

The previous prime is 25552073. The next prime is 25552099. The reversal of 25552081 is 18025552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 960400 = 4959^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 25552081 - 2³ = 25552073 is a prime.

It is a super-2 number, since 2×25552081² = 1305817686861122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25552181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776040 + 12776041.

It is an arithmetic number, because the mean of its divisors is an integer number (12776041).

Almost surely, 2^25552081 is an apocalyptic number.

It is an amenable number.

25552081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25552081 is an equidigital number, since it uses as much as digits as its factorization.

25552081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 25552081 is about 5054.9066262395. The cubic root of 25552081 is about 294.5385142992.

The spelling of 25552081 in words is "twenty-five million, five hundred fifty-two thousand, eighty-one".