2291781603 has 4 divisors (see below), whose sum is σ = 3055708808. Its totient is φ = 1527854400.

The previous prime is 2291781599. The next prime is 2291781623. The reversal of 2291781603 is 3061871922.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2291781603 - 2² = 2291781599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291781623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381963598 + ... + 381963603.

It is an arithmetic number, because the mean of its divisors is an integer number (763927202).

Almost surely, 2^2291781603 is an apocalyptic number.

2291781603 is a deficient number, since it is larger than the sum of its proper divisors (763927205).

2291781603 is an equidigital number, since it uses as much as digits as its factorization.

2291781603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763927204.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 2291781603 is about 47872.5558436146. Note that the first 3 decimals coincide. The cubic root of 2291781603 is about 1318.4320230698.

The spelling of 2291781603 in words is "two billion, two hundred ninety-one million, seven hundred eighty-one thousand, six hundred three".