2291731 has 8 divisors (see below), whose sum is σ = 2484720. Its totient is φ = 2101152.

The previous prime is 2291717. The next prime is 2291747. The reversal of 2291731 is 1371922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2291731 - 2⁵ = 2291699 is a prime.

It is a super-2 number, since 2×2291731² = 10504061952722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2291696 and 2291705.

It is not an unprimeable number, because it can be changed into a prime (2291131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 2758.

It is an arithmetic number, because the mean of its divisors is an integer number (310590).

2^2291731 is an apocalyptic number.

2291731 is a deficient number, since it is larger than the sum of its proper divisors (192989).

2291731 is a wasteful number, since it uses less digits than its factorization.

2291731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205.

The product of its digits is 756, while the sum is 25.

The square root of 2291731 is about 1513.8464255003. The cubic root of 2291731 is about 131.8422319250.

The spelling of 2291731 in words is "two million, two hundred ninety-one thousand, seven hundred thirty-one".