2191925124 has 135 divisors (see below), whose sum is σ = 6113101267. Its totient is φ = 687662784.

The previous prime is 2191925117. The next prime is 2191925189. The reversal of 2191925124 is 4215291912.

The square root of 2191925124 is 46818.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 680270724 + 1511654400 = 26082^2 + 38880^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=4, B=153.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

Its product of digits (12960) is a multiple of the sum of its prime factors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 128936764 + ... + 128936780.

Almost surely, 2^2191925124 is an apocalyptic number.

2191925124 is the 46818-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191925124

2191925124 is an abundant number, since it is smaller than the sum of its proper divisors (3921176143).

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

2191925124 is an frugal number, since it uses more digits than its factorization.

2191925124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 22 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The cubic root of 2191925124 is about 1298.9982665627.

Multiplying 2191925124 by its sum of digits (36), we get a square (78909304464 = 280908²).

2191925124 divided by its sum of digits (36) gives a square (60886809 = 7803²).

The spelling of 2191925124 in words is "two billion, one hundred ninety-one million, nine hundred twenty-five thousand, one hundred twenty-four".