25530550 has 12 divisors (see below), whose sum is σ = 47486916. Its totient is φ = 10212200.

The previous prime is 25530517. The next prime is 25530553. The reversal of 25530550 is 5503552.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530553) 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 5 ways as a sum of consecutive naturals, for example, 255256 + ... + 255355.

It is an arithmetic number, because the mean of its divisors is an integer number (3957243).

Almost surely, 2^25530550 is an apocalyptic number.

25530550 is a deficient number, since it is larger than the sum of its proper divisors (21956366).

25530550 is a wasteful number, since it uses less digits than its factorization.

25530550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510623 (or 510618 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 25530550 is about 5052.7764644797. The cubic root of 25530550 is about 294.4557618634.

The spelling of 25530550 in words is "twenty-five million, five hundred thirty thousand, five hundred fifty".