2228731 has 2 divisors, whose sum is σ = 2228732. Its totient is φ = 2228730.

The previous prime is 2228713. The next prime is 2228741. The reversal of 2228731 is 1378222.

Together with previous prime (2228713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2228731 - 2¹³ = 2220539 is a prime.

It is a super-2 number, since 2×2228731² = 9934483740722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 2¹⁷ + 2²¹ + 8 + 7³ + 3³ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 2228696 and 2228705.

It is not a weakly prime, because it can be changed into another prime (2228711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114365 + 1114366.

It is an arithmetic number, because the mean of its divisors is an integer number (1114366).

2^2228731 is an apocalyptic number.

2228731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2228731 is an equidigital number, since it uses as much as digits as its factorization.

2228731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 2228731 is about 1492.8934992155. The cubic root of 2228731 is about 130.6228688709.

The spelling of 2228731 in words is "two million, two hundred twenty-eight thousand, seven hundred thirty-one".