225729847891 has 2 divisors, whose sum is σ = 225729847892. Its totient is φ = 225729847890.

The previous prime is 225729847883. The next prime is 225729847951. The reversal of 225729847891 is 198748927522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225729847891 - 2³ = 225729847883 is a prime.

It is not a weakly prime, because it can be changed into another prime (225729847391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112864923945 + 112864923946.

It is an arithmetic number, because the mean of its divisors is an integer number (112864923946).

Almost surely, 2^225729847891 is an apocalyptic number.

225729847891 is a deficient number, since it is larger than the sum of its proper divisors (1).

225729847891 is an equidigital number, since it uses as much as digits as its factorization.

225729847891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 64.

The spelling of 225729847891 in words is "two hundred twenty-five billion, seven hundred twenty-nine million, eight hundred forty-seven thousand, eight hundred ninety-one".