2131759 has 4 divisors (see below), whose sum is σ = 2436304. Its totient is φ = 1827216.

The previous prime is 2131721. The next prime is 2131771. The reversal of 2131759 is 9571312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131759 - 2⁹ = 2131247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152262 + ... + 152275.

It is an arithmetic number, because the mean of its divisors is an integer number (609076).

2^2131759 is an apocalyptic number.

2131759 is a deficient number, since it is larger than the sum of its proper divisors (304545).

2131759 is an equidigital number, since it uses as much as digits as its factorization.

2131759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304544.

The product of its digits is 1890, while the sum is 28.

The square root of 2131759 is about 1460.0544510394. The cubic root of 2131759 is about 128.7002434437.

The spelling of 2131759 in words is "two million, one hundred thirty-one thousand, seven hundred fifty-nine".