25561030 has 32 divisors (see below), whose sum is σ = 53148960. Its totient is φ = 8747520.

The previous prime is 25561009. The next prime is 25561031. The reversal of 25561030 is 3016552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 25560992 and 25561010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561031) 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, 4965 + ... + 8704.

It is an arithmetic number, because the mean of its divisors is an integer number (1660905).

Almost surely, 2^25561030 is an apocalyptic number.

25561030 is an abundant number, since it is smaller than the sum of its proper divisors (27587930).

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

25561030 is a wasteful number, since it uses less digits than its factorization.

25561030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 25561030 is about 5055.7917283053. The cubic root of 25561030 is about 294.5728952891.

Adding to 25561030 its reverse (3016552), we get a palindrome (28577582).

The spelling of 25561030 in words is "twenty-five million, five hundred sixty-one thousand, thirty".