25815030 has 16 divisors (see below), whose sum is σ = 61956144. Its totient is φ = 6884000.

The previous prime is 25815001. The next prime is 25815089. The reversal of 25815030 is 3051852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430221 + ... + 430280.

It is an arithmetic number, because the mean of its divisors is an integer number (3872259).

Almost surely, 2^25815030 is an apocalyptic number.

25815030 is an abundant number, since it is smaller than the sum of its proper divisors (36141114).

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

25815030 is a wasteful number, since it uses less digits than its factorization.

25815030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860511.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 25815030 is about 5080.8493384473. The cubic root of 25815030 is about 295.5454048833.

Adding to 25815030 its reverse (3051852), we get a palindrome (28866882).

The spelling of 25815030 in words is "twenty-five million, eight hundred fifteen thousand, thirty".