231012427 has 2 divisors, whose sum is σ = 231012428. Its totient is φ = 231012426.

The previous prime is 231012413. The next prime is 231012479. The reversal of 231012427 is 724210132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231012427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231012398 and 231012407.

It is not a weakly prime, because it can be changed into another prime (231012407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506213 + 115506214.

It is an arithmetic number, because the mean of its divisors is an integer number (115506214).

Almost surely, 2^231012427 is an apocalyptic number.

231012427 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012427 is an equidigital number, since it uses as much as digits as its factorization.

231012427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 231012427 is about 15199.0929663582. The cubic root of 231012427 is about 613.5902465817.

Adding to 231012427 its reverse (724210132), we get a palindrome (955222559).

The spelling of 231012427 in words is "two hundred thirty-one million, twelve thousand, four hundred twenty-seven".