231425 has 6 divisors (see below), whose sum is σ = 286998. Its totient is φ = 185120.

The previous prime is 231419. The next prime is 231431. The reversal of 231425 is 524132.

It is an interprime number because it is at equal distance from previous prime (231419) and next prime (231431).

It can be written as a sum of positive squares in 3 ways, for example, as 64 + 231361 = 8^2 + 481^2 .

It is not a de Polignac number, because 231425 - 2⁴ = 231409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4604 + ... + 4653.

It is an arithmetic number, because the mean of its divisors is an integer number (47833).

231425 is a Friedman number, since it can be written as 5^2*(21^3-4), using all its digits and the basic arithmetic operations.

It is a Proth number, since it is equal to 113 ⋅ 2¹¹ + 1 and 113 < 2¹¹.

2²³¹⁴²⁵ is an apocalyptic number.

231425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231425 is a deficient number, since it is larger than the sum of its proper divisors (55573).

231425 is an equidigital number, since it uses as much as digits as its factorization.

231425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9267 (or 9262 counting only the distinct ones).

The product of its digits is 240, while the sum is 17.

The square root of 231425 is about 481.0665234663. The cubic root of 231425 is about 61.3955306617.

Adding to 231425 its reverse (524132), we get a palindrome (755557).

It can be divided in two parts, 231 and 425, that added together give a palindrome (656).

The spelling of 231425 in words is "two hundred thirty-one thousand, four hundred twenty-five".