2191541235 has 32 divisors (see below), whose sum is σ = 3785839680. Its totient is φ = 1076156928.

The previous prime is 2191541189. The next prime is 2191541237. The reversal of 2191541235 is 5321451912.

It is a happy number.

It is not a de Polignac number, because 2191541235 - 2¹¹ = 2191539187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2191541196 and 2191541205.

It is not an unprimeable number, because it can be changed into a prime (2191541237) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 63261 + ... + 91569.

It is an arithmetic number, because the mean of its divisors is an integer number (118307490).

Almost surely, 2^2191541235 is an apocalyptic number.

2191541235 is a deficient number, since it is larger than the sum of its proper divisors (1594298445).

2191541235 is a wasteful number, since it uses less digits than its factorization.

2191541235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28727.

The product of its digits is 10800, while the sum is 33.

The square root of 2191541235 is about 46813.9000191183. The cubic root of 2191541235 is about 1298.9224275578.

The spelling of 2191541235 in words is "two billion, one hundred ninety-one million, five hundred forty-one thousand, two hundred thirty-five".