2231431 has 2 divisors, whose sum is σ = 2231432. Its totient is φ = 2231430.

The previous prime is 2231429. The next prime is 2231447. The reversal of 2231431 is 1341322.

It is a happy number.

It is an a-pointer prime, because the next prime (2231447) can be obtained adding 2231431 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2231431 - 2¹ = 2231429 is a prime.

It is a super-3 number, since 3×2231431³ = 33332788086454307973, which contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 2231429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115715 + 1115716.

It is an arithmetic number, because the mean of its divisors is an integer number (1115716).

2^2231431 is an apocalyptic number.

2231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231431 is an equidigital number, since it uses as much as digits as its factorization.

2231431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 2231431 is about 1493.7975097047. The cubic root of 2231431 is about 130.6755953510.

Adding to 2231431 its reverse (1341322), we get a palindrome (3572753).

It can be divided in two parts, 2231 and 431, that added together give a palindrome (2662).

The spelling of 2231431 in words is "two million, two hundred thirty-one thousand, four hundred thirty-one".