231165425 has 6 divisors (see below), whose sum is σ = 286645158. Its totient is φ = 184932320.

The previous prime is 231165413. The next prime is 231165427. The reversal of 231165425 is 524561132.

It can be written as a sum of positive squares in 3 ways, for example, as 247009 + 230918416 = 497^2 + 15196^2 .

It is not a de Polignac number, because 231165425 - 2¹⁶ = 231099889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231165427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4623284 + ... + 4623333.

It is an arithmetic number, because the mean of its divisors is an integer number (47774193).

Almost surely, 2^231165425 is an apocalyptic number.

231165425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231165425 is a deficient number, since it is larger than the sum of its proper divisors (55479733).

231165425 is an equidigital number, since it uses as much as digits as its factorization.

231165425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9246627 (or 9246622 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 231165425 is about 15204.1252625727. The cubic root of 231165425 is about 613.7256756066.

The spelling of 231165425 in words is "two hundred thirty-one million, one hundred sixty-five thousand, four hundred twenty-five".