25228481 has 2 divisors, whose sum is σ = 25228482. Its totient is φ = 25228480.

The previous prime is 25228457. The next prime is 25228507. The reversal of 25228481 is 18482252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 11971600 = 3641^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 25228481 - 2¹⁰ = 25227457 is a prime.

It is a super-2 number, since 2×25228481² = 1272952507134722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25228421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12614240 + 12614241.

It is an arithmetic number, because the mean of its divisors is an integer number (12614241).

Almost surely, 2^25228481 is an apocalyptic number.

It is an amenable number.

25228481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25228481 is an equidigital number, since it uses as much as digits as its factorization.

25228481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 32.

The square root of 25228481 is about 5022.7961336292. The cubic root of 25228481 is about 293.2898505047.

The spelling of 25228481 in words is "twenty-five million, two hundred twenty-eight thousand, four hundred eighty-one".