2231389 has 2 divisors, whose sum is σ = 2231390. Its totient is φ = 2231388.

The previous prime is 2231381. The next prime is 2231407. The reversal of 2231389 is 9831322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125764 + 105625 = 1458^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231389 - 2³ = 2231381 is a prime.

It is a super-3 number, since 3×2231389³ = 33330905952411950607, which contains 333 as substring.

2231389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115694 + 1115695.

It is an arithmetic number, because the mean of its divisors is an integer number (1115695).

2^2231389 is an apocalyptic number.

It is an amenable number.

2231389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231389 is an equidigital number, since it uses as much as digits as its factorization.

2231389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 2231389 is about 1493.7834515083. The cubic root of 2231389 is about 130.6747754871.

The spelling of 2231389 in words is "two million, two hundred thirty-one thousand, three hundred eighty-nine".