225186591 has 8 divisors (see below), whose sum is σ = 343141504. Its totient is φ = 128678040.

The previous prime is 225186589. The next prime is 225186659. The reversal of 225186591 is 195681522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225186591 - 2¹ = 225186589 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 (225186581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5361565 + ... + 5361606.

It is an arithmetic number, because the mean of its divisors is an integer number (42892688).

Almost surely, 2^225186591 is an apocalyptic number.

225186591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

225186591 is a deficient number, since it is larger than the sum of its proper divisors (117954913).

225186591 is a wasteful number, since it uses less digits than its factorization.

225186591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723181.

The product of its digits is 43200, while the sum is 39.

The square root of 225186591 is about 15006.2184110455. The cubic root of 225186591 is about 608.3882840877.

The spelling of 225186591 in words is "two hundred twenty-five million, one hundred eighty-six thousand, five hundred ninety-one".