225195811 has 4 divisors (see below), whose sum is σ = 232460224. Its totient is φ = 217931400.

The previous prime is 225195799. The next prime is 225195827. The reversal of 225195811 is 118591522.

225195811 = T₂₁₅₄ + T₂₁₅₅ + ... + T₂₂₄₆.

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

It is a cyclic number.

It is not a de Polignac number, because 225195811 - 2¹⁷ = 225064739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225190811) 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, 3632160 + ... + 3632221.

It is an arithmetic number, because the mean of its divisors is an integer number (58115056).

Almost surely, 2^225195811 is an apocalyptic number.

225195811 is a deficient number, since it is larger than the sum of its proper divisors (7264413).

225195811 is an equidigital number, since it uses as much as digits as its factorization.

225195811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264412.

The product of its digits is 7200, while the sum is 34.

The square root of 225195811 is about 15006.5256138788. The cubic root of 225195811 is about 608.3965872218.

The spelling of 225195811 in words is "two hundred twenty-five million, one hundred ninety-five thousand, eight hundred eleven".