25455221 has 8 divisors (see below), whose sum is σ = 27941664. Its totient is φ = 22997520.

The previous prime is 25455217. The next prime is 25455229. The reversal of 25455221 is 12255452.

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 25455221 - 2² = 25455217 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 (25455229) 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, 5306 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (3492708).

Almost surely, 2^25455221 is an apocalyptic number.

It is an amenable number.

25455221 is a deficient number, since it is larger than the sum of its proper divisors (2486443).

25455221 is a wasteful number, since it uses less digits than its factorization.

25455221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14371.

The product of its digits is 4000, while the sum is 26.

The square root of 25455221 is about 5045.3167393138. The cubic root of 25455221 is about 294.1658750506.

The spelling of 25455221 in words is "twenty-five million, four hundred fifty-five thousand, two hundred twenty-one".