25307530 has 16 divisors (see below), whose sum is σ = 46103904. Its totient is φ = 10000720.

The previous prime is 25307507. The next prime is 25307531. The reversal of 25307530 is 3570352.

It is a super-3 number, since 3×25307530³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25307495 and 25307504.

It is not an unprimeable number, because it can be changed into a prime (25307531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14416 + ... + 16075.

It is an arithmetic number, because the mean of its divisors is an integer number (2881494).

Almost surely, 2^25307530 is an apocalyptic number.

25307530 is a deficient number, since it is larger than the sum of its proper divisors (20796374).

25307530 is a wasteful number, since it uses less digits than its factorization.

25307530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30581.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 25307530 is about 5030.6590025562. The cubic root of 25307530 is about 293.5958551462.

Adding to 25307530 its reverse (3570352), we get a palindrome (28877882).

The spelling of 25307530 in words is "twenty-five million, three hundred seven thousand, five hundred thirty".