25300000 has 144 divisors (see below), whose sum is σ = 70870464. Its totient is φ = 8800000.

The previous prime is 25299997. The next prime is 25300003. The reversal of 25300000 is 352.

It is an interprime number because it is at equal distance from previous prime (25299997) and next prime (25300003).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 25300000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25300003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1099989 + ... + 1100011.

It is an arithmetic number, because the mean of its divisors is an integer number (492156).

Almost surely, 2^25300000 is an apocalyptic number.

25300000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35435232).

25300000 is an abundant number, since it is smaller than the sum of its proper divisors (45570464).

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

25300000 is an equidigital number, since it uses as much as digits as its factorization.

25300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 25300000 is about 5029.9105359837. The cubic root of 25300000 is about 293.5667334304.

Adding to 25300000 its reverse (352), we get a palindrome (25300352).

The spelling of 25300000 in words is "twenty-five million, three hundred thousand".