226686523 has 4 divisors (see below), whose sum is σ = 259070320. Its totient is φ = 194302728.

The previous prime is 226686487. The next prime is 226686547. The reversal of 226686523 is 325686622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325686622 = 2 ⋅162843311.

It is a cyclic number.

It is not a de Polignac number, because 226686523 - 2²⁵ = 193132091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226686563) 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, 16191888 + ... + 16191901.

It is an arithmetic number, because the mean of its divisors is an integer number (64767580).

Almost surely, 2^226686523 is an apocalyptic number.

226686523 is a deficient number, since it is larger than the sum of its proper divisors (32383797).

226686523 is an equidigital number, since it uses as much as digits as its factorization.

226686523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32383796.

The product of its digits is 207360, while the sum is 40.

The square root of 226686523 is about 15056.1124796542. The cubic root of 226686523 is about 609.7360884710.

Subtracting 226686523 from its reverse (325686622), we obtain a palindrome (99000099).

The spelling of 226686523 in words is "two hundred twenty-six million, six hundred eighty-six thousand, five hundred twenty-three".