227896210091 has 4 divisors (see below), whose sum is σ = 248614047384. Its totient is φ = 207178372800.

The previous prime is 227896210081. The next prime is 227896210097. The reversal of 227896210091 is 190012698722.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227896210091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227896210097) 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, 10358918630 + ... + 10358918651.

It is an arithmetic number, because the mean of its divisors is an integer number (62153511846).

Almost surely, 2^227896210091 is an apocalyptic number.

227896210091 is a deficient number, since it is larger than the sum of its proper divisors (20717837293).

227896210091 is a wasteful number, since it uses less digits than its factorization.

227896210091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20717837292.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 227896210091 in words is "two hundred twenty-seven billion, eight hundred ninety-six million, two hundred ten thousand, ninety-one".