25440533 has 2 divisors, whose sum is σ = 25440534. Its totient is φ = 25440532.

The previous prime is 25440529. The next prime is 25440539. The reversal of 25440533 is 33504452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 18769 = 5042^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 25440533 - 2² = 25440529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720266 + 12720267.

It is an arithmetic number, because the mean of its divisors is an integer number (12720267).

Almost surely, 2^25440533 is an apocalyptic number.

It is an amenable number.

25440533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440533 is an equidigital number, since it uses as much as digits as its factorization.

25440533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 25440533 is about 5043.8609219525. The cubic root of 25440533 is about 294.1092849615.

Adding to 25440533 its reverse (33504452), we get a palindrome (58944985).

The spelling of 25440533 in words is "twenty-five million, four hundred forty thousand, five hundred thirty-three".