2291901 has 4 divisors (see below), whose sum is σ = 3055872. Its totient is φ = 1527932.

The previous prime is 2291893. The next prime is 2291903. The reversal of 2291901 is 1091922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2291901 - 2³ = 2291893 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291903) 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 3 ways as a sum of consecutive naturals, for example, 381981 + ... + 381986.

It is an arithmetic number, because the mean of its divisors is an integer number (763968).

2^2291901 is an apocalyptic number.

It is an amenable number.

2291901 is a deficient number, since it is larger than the sum of its proper divisors (763971).

2291901 is an equidigital number, since it uses as much as digits as its factorization.

2291901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763970.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2291901 is about 1513.9025728230. The cubic root of 2291901 is about 131.8454918517.

The spelling of 2291901 in words is "two million, two hundred ninety-one thousand, nine hundred one".