231261427 has 4 divisors (see below), whose sum is σ = 233859960. Its totient is φ = 228662896.

The previous prime is 231261397. The next prime is 231261449. The reversal of 231261427 is 724162132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231261427 - 2²⁷ = 97043699 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231261395 and 231261404.

It is not an unprimeable number, because it can be changed into a prime (231261497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299133 + ... + 1299310.

It is an arithmetic number, because the mean of its divisors is an integer number (58464990).

Almost surely, 2^231261427 is an apocalyptic number.

231261427 is a deficient number, since it is larger than the sum of its proper divisors (2598533).

231261427 is an equidigital number, since it uses as much as digits as its factorization.

231261427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598532.

The product of its digits is 4032, while the sum is 28.

The square root of 231261427 is about 15207.2820385498. The cubic root of 231261427 is about 613.8106230535.

The spelling of 231261427 in words is "two hundred thirty-one million, two hundred sixty-one thousand, four hundred twenty-seven".