2191287230 has 64 divisors (see below), whose sum is σ = 4454170560. Its totient is φ = 769228800.

The previous prime is 2191287187. The next prime is 2191287269. The reversal of 2191287230 is 327821912.

2191287230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2191287230² = 9603479448722145800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434966 + ... + 439974.

It is an arithmetic number, because the mean of its divisors is an integer number (69596415).

Almost surely, 2^2191287230 is an apocalyptic number.

2191287230 is an abundant number, since it is smaller than the sum of its proper divisors (2262883330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191287230 is a wasteful number, since it uses less digits than its factorization.

2191287230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 2191287230 is about 46811.1870176350. The cubic root of 2191287230 is about 1298.8722428547.

The spelling of 2191287230 in words is "two billion, one hundred ninety-one million, two hundred eighty-seven thousand, two hundred thirty".