25554551 has 8 divisors (see below), whose sum is σ = 28024464. Its totient is φ = 23109120.

The previous prime is 25554517. The next prime is 25554569. The reversal of 25554551 is 15545552.

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

It is a cyclic number.

It is not a de Polignac number, because 25554551 - 2¹⁴ = 25538167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25554251) 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, 3896 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (3503058).

Almost surely, 2^25554551 is an apocalyptic number.

25554551 is a deficient number, since it is larger than the sum of its proper divisors (2469913).

25554551 is a wasteful number, since it uses less digits than its factorization.

25554551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241.

The product of its digits is 25000, while the sum is 32.

The square root of 25554551 is about 5055.1509374103. The cubic root of 25554551 is about 294.5480045464.

The spelling of 25554551 in words is "twenty-five million, five hundred fifty-four thousand, five hundred fifty-one".