2231533 has 2 divisors, whose sum is σ = 2231534. Its totient is φ = 2231532.

The previous prime is 2231519. The next prime is 2231587. The reversal of 2231533 is 3351322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304164 + 927369 = 1142^2 + 963^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231533 - 2⁵ = 2231501 is a prime.

It is a super-3 number, since 3×2231533³ = 33337359278394289311, which contains 333 as substring.

2231533 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115766 + 1115767.

It is an arithmetic number, because the mean of its divisors is an integer number (1115767).

2^2231533 is an apocalyptic number.

It is an amenable number.

2231533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231533 is an equidigital number, since it uses as much as digits as its factorization.

2231533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 19.

The square root of 2231533 is about 1493.8316504881. The cubic root of 2231533 is about 130.6775864064.

Adding to 2231533 its reverse (3351322), we get a palindrome (5582855).

The spelling of 2231533 in words is "two million, two hundred thirty-one thousand, five hundred thirty-three".