25522649 has 2 divisors, whose sum is σ = 25522650. Its totient is φ = 25522648.

The previous prime is 25522631. The next prime is 25522669. The reversal of 25522649 is 94622552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23814400 + 1708249 = 4880^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 25522649 - 2¹² = 25518553 is a prime.

It is a super-2 number, since 2×25522649² = 1302811223954402, which contains 22 as substring.

It is equal to p_1596473 and since 25522649 and 1596473 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25522669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12761324 + 12761325.

It is an arithmetic number, because the mean of its divisors is an integer number (12761325).

Almost surely, 2^25522649 is an apocalyptic number.

It is an amenable number.

25522649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25522649 is an equidigital number, since it uses as much as digits as its factorization.

25522649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 25522649 is about 5051.9945566083. The cubic root of 25522649 is about 294.4253834212.

The spelling of 25522649 in words is "twenty-five million, five hundred twenty-two thousand, six hundred forty-nine".