2191639034 has 16 divisors (see below), whose sum is σ = 3549185640. Its totient is φ = 1008998400.

The previous prime is 2191639027. The next prime is 2191639061. The reversal of 2191639034 is 4309361912.

It can be written as a sum of positive squares in 4 ways, for example, as 2070705025 + 120934009 = 45505^2 + 10997^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94679 + ... + 115530.

Almost surely, 2^2191639034 is an apocalyptic number.

2191639034 is a deficient number, since it is larger than the sum of its proper divisors (1357546606).

2191639034 is a wasteful number, since it uses less digits than its factorization.

2191639034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210625.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 2191639034 is about 46814.9445583352. The cubic root of 2191639034 is about 1298.9417490324.

The spelling of 2191639034 in words is "two billion, one hundred ninety-one million, six hundred thirty-nine thousand, thirty-four".