25444481 has 2 divisors, whose sum is σ = 25444482. Its totient is φ = 25444480.

The previous prime is 25444457. The next prime is 25444487. The reversal of 25444481 is 18444452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19219456 + 6225025 = 4384^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 25444481 - 2¹⁴ = 25428097 is a prime.

It is a super-2 number, since 2×25444481² = 1294843226718722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25444487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722240 + 12722241.

It is an arithmetic number, because the mean of its divisors is an integer number (12722241).

Almost surely, 2^25444481 is an apocalyptic number.

It is an amenable number.

25444481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25444481 is an equidigital number, since it uses as much as digits as its factorization.

25444481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20480, while the sum is 32.

The square root of 25444481 is about 5044.2522736279. The cubic root of 25444481 is about 294.1244979996.

The spelling of 25444481 in words is "twenty-five million, four hundred forty-four thousand, four hundred eighty-one".