2152231 has 2 divisors, whose sum is σ = 2152232. Its totient is φ = 2152230.

The previous prime is 2152229. The next prime is 2152247. The reversal of 2152231 is 1322512.

2152231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2152247) can be obtained adding 2152231 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2152231 - 2¹ = 2152229 is a prime.

It is a super-2 number, since 2×2152231² = 9264196554722, which contains 22 as substring.

Together with 2152229, it forms a pair of twin primes.

2152231 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076115 + 1076116.

It is an arithmetic number, because the mean of its divisors is an integer number (1076116).

2^2152231 is an apocalyptic number.

2152231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152231 is an equidigital number, since it uses as much as digits as its factorization.

2152231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 16.

The square root of 2152231 is about 1467.0483972930. The cubic root of 2152231 is about 129.1109155632.

Adding to 2152231 its reverse (1322512), we get a palindrome (3474743).

The spelling of 2152231 in words is "two million, one hundred fifty-two thousand, two hundred thirty-one".