225122687 has 4 divisors (see below), whose sum is σ = 238365216. Its totient is φ = 211880160.

The previous prime is 225122669. The next prime is 225122693. The reversal of 225122687 is 786221522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786221522 = 2 ⋅393110761.

It is a cyclic number.

It is not a de Polignac number, because 225122687 - 2¹⁴ = 225106303 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 (225122617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6621239 + ... + 6621272.

It is an arithmetic number, because the mean of its divisors is an integer number (59591304).

Almost surely, 2^225122687 is an apocalyptic number.

225122687 is a deficient number, since it is larger than the sum of its proper divisors (13242529).

225122687 is a wasteful number, since it uses less digits than its factorization.

225122687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13242528.

The product of its digits is 26880, while the sum is 35.

The square root of 225122687 is about 15004.0890093334. The cubic root of 225122687 is about 608.3307286726.

The spelling of 225122687 in words is "two hundred twenty-five million, one hundred twenty-two thousand, six hundred eighty-seven".