2288731 has 2 divisors, whose sum is σ = 2288732. Its totient is φ = 2288730.

The previous prime is 2288723. The next prime is 2288747. The reversal of 2288731 is 1378822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2288731 - 2³ = 2288723 is a prime.

It is a super-2 number, since 2×2288731² = 10476579180722, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 2288731 parts by 2139 straight cuts.

2288731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2288693 and 2288702.

It is not a weakly prime, because it can be changed into another prime (2288711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144365 + 1144366.

It is an arithmetic number, because the mean of its divisors is an integer number (1144366).

2^2288731 is an apocalyptic number.

2288731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2288731 is an equidigital number, since it uses as much as digits as its factorization.

2288731 is an evil number, because the sum of its binary digits is even.

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

The square root of 2288731 is about 1512.8552475369. The cubic root of 2288731 is about 131.7846772629.

Subtracting from 2288731 its reverse (1378822), we obtain a palindrome (909909).

The spelling of 2288731 in words is "two million, two hundred eighty-eight thousand, seven hundred thirty-one".