2191349504 has 144 divisors (see below), whose sum is σ = 4867581600. Its totient is φ = 979894272.

The previous prime is 2191349473. The next prime is 2191349507. The reversal of 2191349504 is 4059431912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191349507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12242087 + ... + 12242265.

It is an arithmetic number, because the mean of its divisors is an integer number (33802650).

Almost surely, 2^2191349504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191349504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2433790800).

2191349504 is an abundant number, since it is smaller than the sum of its proper divisors (2676232096).

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

2191349504 is a wasteful number, since it uses less digits than its factorization.

2191349504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 2191349504 is about 46811.8521744227. The cubic root of 2191349504 is about 1298.8845469170.

It can be divided in two parts, 21913 and 49504, that added together give a palindrome (71417).

The spelling of 2191349504 in words is "two billion, one hundred ninety-one million, three hundred forty-nine thousand, five hundred four".