225311811 has 8 divisors (see below), whose sum is σ = 300729024. Its totient is φ = 150051240.

The previous prime is 225311791. The next prime is 225311831. The reversal of 225311811 is 118113522.

It is an interprime number because it is at equal distance from previous prime (225311791) and next prime (225311831).

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

It is not a de Polignac number, because 225311811 - 2⁷ = 225311683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225311831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35761 + ... + 41586.

It is an arithmetic number, because the mean of its divisors is an integer number (37591128).

Almost surely, 2^225311811 is an apocalyptic number.

225311811 is a deficient number, since it is larger than the sum of its proper divisors (75417213).

225311811 is an equidigital number, since it uses as much as digits as its factorization.

225311811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78321.

The product of its digits is 480, while the sum is 24.

The square root of 225311811 is about 15010.3901015263. The cubic root of 225311811 is about 608.5010324593.

It can be divided in two parts, 22531 and 1811, that added together give a palindrome (24342).

The spelling of 225311811 in words is "two hundred twenty-five million, three hundred eleven thousand, eight hundred eleven".