7312231 has 2 divisors, whose sum is σ = 7312232. Its totient is φ = 7312230.

The previous prime is 7312177. The next prime is 7312237. The reversal of 7312231 is 1322137.

It is a strong prime.

It is an emirp because it is prime and its reverse (1322137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7312231 - 2⁷ = 7312103 is a prime.

It is a super-2 number, since 2×7312231² = 106937444394722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7312199 and 7312208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7312237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3656115 + 3656116.

It is an arithmetic number, because the mean of its divisors is an integer number (3656116).

Almost surely, 2^7312231 is an apocalyptic number.

7312231 is a deficient number, since it is larger than the sum of its proper divisors (1).

7312231 is an equidigital number, since it uses as much as digits as its factorization.

7312231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 19.

The square root of 7312231 is about 2704.1137180230. The cubic root of 7312231 is about 194.0960218316.

Adding to 7312231 its reverse (1322137), we get a palindrome (8634368).

It can be divided in two parts, 73122 and 31, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 7312231 in words is "seven million, three hundred twelve thousand, two hundred thirty-one".