225678691 has 16 divisors (see below), whose sum is σ = 269733888. Its totient is φ = 184615200.

The previous prime is 225678679. The next prime is 225678721. The reversal of 225678691 is 196876522.

It is not a de Polignac number, because 225678691 - 2⁵ = 225678659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225678601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85806 + ... + 88396.

It is an arithmetic number, because the mean of its divisors is an integer number (16858368).

Almost surely, 2^225678691 is an apocalyptic number.

225678691 is a deficient number, since it is larger than the sum of its proper divisors (44055197).

225678691 is a wasteful number, since it uses less digits than its factorization.

225678691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162.

The product of its digits is 362880, while the sum is 46.

The square root of 225678691 is about 15022.6059989604. The cubic root of 225678691 is about 608.8311317333.

The spelling of 225678691 in words is "two hundred twenty-five million, six hundred seventy-eight thousand, six hundred ninety-one".