231355447 has 2 divisors, whose sum is σ = 231355448. Its totient is φ = 231355446.

The previous prime is 231355427. The next prime is 231355451. The reversal of 231355447 is 744553132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231355447 - 2¹¹ = 231353399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231355427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115677723 + 115677724.

It is an arithmetic number, because the mean of its divisors is an integer number (115677724).

Almost surely, 2^231355447 is an apocalyptic number.

231355447 is a deficient number, since it is larger than the sum of its proper divisors (1).

231355447 is an equidigital number, since it uses as much as digits as its factorization.

231355447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 34.

The square root of 231355447 is about 15210.3730066031. The cubic root of 231355447 is about 613.8937939429.

It can be divided in two parts, 23135 and 5447, that added together give a palindrome (28582).

The spelling of 231355447 in words is "two hundred thirty-one million, three hundred fifty-five thousand, four hundred forty-seven".