225688487 has 4 divisors (see below), whose sum is σ = 226822800. Its totient is φ = 224554176.

The previous prime is 225688451. The next prime is 225688523. The reversal of 225688487 is 784886522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (225688451) and next prime (225688523).

It is a cyclic number.

It is not a de Polignac number, because 225688487 - 2⁶ = 225688423 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 (225688087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566858 + ... + 567255.

It is an arithmetic number, because the mean of its divisors is an integer number (56705700).

Almost surely, 2^225688487 is an apocalyptic number.

225688487 is a deficient number, since it is larger than the sum of its proper divisors (1134313).

225688487 is a wasteful number, since it uses less digits than its factorization.

225688487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134312.

The product of its digits is 1720320, while the sum is 50.

The square root of 225688487 is about 15022.9320373887. The cubic root of 225688487 is about 608.8399407521.

The spelling of 225688487 in words is "two hundred twenty-five million, six hundred eighty-eight thousand, four hundred eighty-seven".