25550553 has 8 divisors (see below), whose sum is σ = 38934208. Its totient is φ = 14600304.

The previous prime is 25550533. The next prime is 25550561. The reversal of 25550553 is 35505552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25550553 - 2¹⁶ = 25485017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25550553.

It is not an unprimeable number, because it can be changed into a prime (25550513) 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, 608326 + ... + 608367.

It is an arithmetic number, because the mean of its divisors is an integer number (4866776).

Almost surely, 2^25550553 is an apocalyptic number.

It is an amenable number.

25550553 is a deficient number, since it is larger than the sum of its proper divisors (13383655).

25550553 is a wasteful number, since it uses less digits than its factorization.

25550553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216703.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 25550553 is about 5054.7554837005. The cubic root of 25550553 is about 294.5326431033.

It can be divided in two parts, 2 and 5550553, that added together give a palindrome (5550555).

The spelling of 25550553 in words is "twenty-five million, five hundred fifty thousand, five hundred fifty-three".