225811479 has 4 divisors (see below), whose sum is σ = 301081976. Its totient is φ = 150540984.

The previous prime is 225811451. The next prime is 225811489. The reversal of 225811479 is 974118522.

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

It is not a de Polignac number, because 225811479 - 2¹¹ = 225809431 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 (225811489) 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, 37635244 + ... + 37635249.

It is an arithmetic number, because the mean of its divisors is an integer number (75270494).

Almost surely, 2^225811479 is an apocalyptic number.

225811479 is a deficient number, since it is larger than the sum of its proper divisors (75270497).

225811479 is an equidigital number, since it uses as much as digits as its factorization.

225811479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75270496.

The product of its digits is 40320, while the sum is 39.

The square root of 225811479 is about 15027.0249550601. The cubic root of 225811479 is about 608.9505191935.

The spelling of 225811479 in words is "two hundred twenty-five million, eight hundred eleven thousand, four hundred seventy-nine".