25550538 has 16 divisors (see below), whose sum is σ = 55032096. Its totient is φ = 7861680.

The previous prime is 25550533. The next prime is 25550561. The reversal of 25550538 is 83505552.

It is a junction number, because it is equal to n+sod(n) for n = 25550499 and 25550508.

It is not an unprimeable number, because it can be changed into a prime (25550531) 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, 163708 + ... + 163863.

It is an arithmetic number, because the mean of its divisors is an integer number (3439506).

Almost surely, 2^25550538 is an apocalyptic number.

25550538 is an abundant number, since it is smaller than the sum of its proper divisors (29481558).

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

25550538 is a wasteful number, since it uses less digits than its factorization.

25550538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327589.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 25550538 is about 5054.7539999490. The cubic root of 25550538 is about 294.5325854661.

The spelling of 25550538 in words is "twenty-five million, five hundred fifty thousand, five hundred thirty-eight".