25530030 has 48 divisors (see below), whose sum is σ = 66656304. Its totient is φ = 6779520.

The previous prime is 25530013. The next prime is 25530061. The reversal of 25530030 is 3003552.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25529985 and 25530012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29362 + ... + 30218.

It is an arithmetic number, because the mean of its divisors is an integer number (1388673).

Almost surely, 2^25530030 is an apocalyptic number.

25530030 is an abundant number, since it is smaller than the sum of its proper divisors (41126274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25530030 is a wasteful number, since it uses less digits than its factorization.

25530030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 25530030 is about 5052.7250073599. The cubic root of 25530030 is about 294.4537627155.

Adding to 25530030 its reverse (3003552), we get a palindrome (28533582).

The spelling of 25530030 in words is "twenty-five million, five hundred thirty thousand, thirty".