2287831 has 16 divisors (see below), whose sum is σ = 2910208. Its totient is φ = 1749600.

The previous prime is 2287823. The next prime is 2287861. The reversal of 2287831 is 1387822.

2287831 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a 7-Lehmer number, since φ(2287831) divides (2287831-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 2287831 - 2³ = 2287823 is a prime.

It is a super-2 number, since 2×2287831² = 10468341369122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

2287831 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2287793 and 2287802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2287811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416 + ... + 3226.

It is an arithmetic number, because the mean of its divisors is an integer number (181888).

2^2287831 is an apocalyptic number.

2287831 is a deficient number, since it is larger than the sum of its proper divisors (622377).

2287831 is a wasteful number, since it uses less digits than its factorization.

2287831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its digits is 5376, while the sum is 31.

The square root of 2287831 is about 1512.5577674919. The cubic root of 2287831 is about 131.7674010577.

Subtracting from 2287831 its reverse (1387822), we obtain a palindrome (900009).

The spelling of 2287831 in words is "two million, two hundred eighty-seven thousand, eight hundred thirty-one".