12302531 has 2 divisors, whose sum is σ = 12302532. Its totient is φ = 12302530.

The previous prime is 12302527. The next prime is 12302533. The reversal of 12302531 is 13520321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12302531 - 2² = 12302527 is a prime.

It is a super-2 number, since 2×12302531² = 302704538011922, which contains 22 as substring.

Together with 12302533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12302533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6151265 + 6151266.

It is an arithmetic number, because the mean of its divisors is an integer number (6151266).

Almost surely, 2^12302531 is an apocalyptic number.

12302531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12302531 is an equidigital number, since it uses as much as digits as its factorization.

12302531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12302531 is about 3507.4964005684. The cubic root of 12302531 is about 230.8508560452.

Adding to 12302531 its reverse (13520321), we get a palindrome (25822852).

The spelling of 12302531 in words is "twelve million, three hundred two thousand, five hundred thirty-one".