2181749967 has 12 divisors (see below), whose sum is σ = 3204831240. Its totient is φ = 1429847088.

The previous prime is 2181749959. The next prime is 2181750001. The reversal of 2181749967 is 7699471812.

It is not a de Polignac number, because 2181749967 - 2³ = 2181749959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181749567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2053848 + ... + 2054909.

It is an arithmetic number, because the mean of its divisors is an integer number (267069270).

Almost surely, 2^2181749967 is an apocalyptic number.

2181749967 is a deficient number, since it is larger than the sum of its proper divisors (1023081273).

2181749967 is a wasteful number, since it uses less digits than its factorization.

2181749967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108822 (or 4108819 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 2181749967 is about 46709.2064479798. The cubic root of 2181749967 is about 1296.9851174137.

The spelling of 2181749967 in words is "two billion, one hundred eighty-one million, seven hundred forty-nine thousand, nine hundred sixty-seven".