2191749104 has 40 divisors (see below), whose sum is σ = 4614228480. Its totient is φ = 1004702400.

The previous prime is 2191749101. The next prime is 2191749137. The reversal of 2191749104 is 4019471912.

2191749104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191749101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106862 + ... + 125709.

It is an arithmetic number, because the mean of its divisors is an integer number (115355712).

Almost surely, 2^2191749104 is an apocalyptic number.

It is an amenable number.

2191749104 is an abundant number, since it is smaller than the sum of its proper divisors (2422479376).

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

2191749104 is a wasteful number, since it uses less digits than its factorization.

2191749104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232629 (or 232623 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 2191749104 is about 46816.1201297160. The cubic root of 2191749104 is about 1298.9634941164.

The spelling of 2191749104 in words is "two billion, one hundred ninety-one million, seven hundred forty-nine thousand, one hundred four".