2231329 has 2 divisors, whose sum is σ = 2231330. Its totient is φ = 2231328.

The previous prime is 2231311. The next prime is 2231351. The reversal of 2231329 is 9231322.

It is an a-pointer prime, because the next prime (2231351) can be obtained adding 2231329 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 200704 = 1425^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231329 - 2⁵ = 2231297 is a prime.

It is a super-3 number, since 3×2231329³ = 33328217312398872867, which contains 333 as substring.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 2231329 parts by 2112 straight cuts.

It is equal to p₁₆₄₈₀₃ and since 2231329 and 164803 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2231309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115664 + 1115665.

It is an arithmetic number, because the mean of its divisors is an integer number (1115665).

2^2231329 is an apocalyptic number.

It is an amenable number.

2231329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231329 is an equidigital number, since it uses as much as digits as its factorization.

2231329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 2231329 is about 1493.7633681410. The cubic root of 2231329 is about 130.6736042351.

The spelling of 2231329 in words is "two million, two hundred thirty-one thousand, three hundred twenty-nine".