2191294730 has 64 divisors (see below), whose sum is σ = 4245229440. Its totient is φ = 811474944.

The previous prime is 2191294711. The next prime is 2191294769. The reversal of 2191294730 is 374921912.

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, 3255674 + ... + 3256346.

It is an arithmetic number, because the mean of its divisors is an integer number (66331710).

Almost surely, 2^2191294730 is an apocalyptic number.

2191294730 is a deficient number, since it is larger than the sum of its proper divisors (2053934710).

2191294730 is a wasteful number, since it uses less digits than its factorization.

2191294730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2191294730 is about 46811.2671266224. The cubic root of 2191294730 is about 1298.8737247129.

The spelling of 2191294730 in words is "two billion, one hundred ninety-one million, two hundred ninety-four thousand, seven hundred thirty".