231432427 has 2 divisors, whose sum is σ = 231432428. Its totient is φ = 231432426.

The previous prime is 231432419. The next prime is 231432431. The reversal of 231432427 is 724234132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231432427 - 2³ = 231432419 is a prime.

It is a super-2 number, since 2×231432427² = 107121936534220658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231432395 and 231432404.

It is not a weakly prime, because it can be changed into another prime (231432457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115716213 + 115716214.

It is an arithmetic number, because the mean of its divisors is an integer number (115716214).

Almost surely, 2^231432427 is an apocalyptic number.

231432427 is a deficient number, since it is larger than the sum of its proper divisors (1).

231432427 is an equidigital number, since it uses as much as digits as its factorization.

231432427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 28.

The square root of 231432427 is about 15212.9033060754. The cubic root of 231432427 is about 613.9618743281.

Adding to 231432427 its reverse (724234132), we get a palindrome (955666559).

The spelling of 231432427 in words is "two hundred thirty-one million, four hundred thirty-two thousand, four hundred twenty-seven".