25481530 has 32 divisors (see below), whose sum is σ = 47921040. Its totient is φ = 9745920.

The previous prime is 25481509. The next prime is 25481531. The reversal of 25481530 is 3518452.

It can be written as a sum of positive squares in 8 ways, for example, as 3775249 + 21706281 = 1943^2 + 4659^2 .

It is a super-2 number, since 2×25481530² = 1298616742281800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25481531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22006 + ... + 23134.

Almost surely, 2^25481530 is an apocalyptic number.

25481530 is a deficient number, since it is larger than the sum of its proper divisors (22439510).

25481530 is a wasteful number, since it uses less digits than its factorization.

25481530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25481530 is about 5047.9233353925. The cubic root of 25481530 is about 294.2671842643.

Adding to 25481530 its reverse (3518452), we get a palindrome (28999982).

The spelling of 25481530 in words is "twenty-five million, four hundred eighty-one thousand, five hundred thirty".