2191928534 has 8 divisors (see below), whose sum is σ = 3293652648. Its totient is φ = 1094044320.

The previous prime is 2191928513. The next prime is 2191928537. The reversal of 2191928534 is 4358291912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191928537) 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, 958547 + ... + 960830.

It is an arithmetic number, because the mean of its divisors is an integer number (411706581).

Almost surely, 2^2191928534 is an apocalyptic number.

2191928534 is a deficient number, since it is larger than the sum of its proper divisors (1101724114).

2191928534 is a wasteful number, since it uses less digits than its factorization.

2191928534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919950.

The product of its digits is 155520, while the sum is 44.

The square root of 2191928534 is about 46818.0364176030. The cubic root of 2191928534 is about 1298.9989401839.

The spelling of 2191928534 in words is "two billion, one hundred ninety-one million, nine hundred twenty-eight thousand, five hundred thirty-four".