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12231431 is a prime number
BaseRepresentation
bin101110101010…
…001100000111
3212000102100222
4232222030013
511112401211
61114054555
7205652102
oct56521407
925012328
1012231431
1169a4723
12411a45b
1326c3444
1418a5739
1511191db
hexbaa307

12231431 has 2 divisors, whose sum is σ = 12231432. Its totient is φ = 12231430.

The previous prime is 12231419. The next prime is 12231433. The reversal of 12231431 is 13413221.

12231431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12231431 - 26 = 12231367 is a prime.

It is a super-2 number, since 2×122314312 = 299215808615522, which contains 22 as substring.

Together with 12231433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115715 + 6115716.

It is an arithmetic number, because the mean of its divisors is an integer number (6115716).

Almost surely, 212231431 is an apocalyptic number.

12231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231431 is an equidigital number, since it uses as much as digits as its factorization.

12231431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 12231431 is about 3497.3462796812. The cubic root of 12231431 is about 230.4052778880.

Adding to 12231431 its reverse (13413221), we get a palindrome (25644652).

The spelling of 12231431 in words is "twelve million, two hundred thirty-one thousand, four hundred thirty-one".