231205001 has 4 divisors (see below), whose sum is σ = 233802900. Its totient is φ = 228607104.

The previous prime is 231204997. The next prime is 231205003. The reversal of 231205001 is 100502132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69889600 + 161315401 = 8360^2 + 12701^2 .

It is a cyclic number.

It is not a de Polignac number, because 231205001 - 2² = 231204997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231205003) 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, 1298816 + ... + 1298993.

It is an arithmetic number, because the mean of its divisors is an integer number (58450725).

Almost surely, 2^231205001 is an apocalyptic number.

It is an amenable number.

231205001 is a deficient number, since it is larger than the sum of its proper divisors (2597899).

231205001 is an equidigital number, since it uses as much as digits as its factorization.

231205001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597898.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 231205001 is about 15205.4266957557. The cubic root of 231205001 is about 613.7606973108.

Adding to 231205001 its reverse (100502132), we get a palindrome (331707133).

The spelling of 231205001 in words is "two hundred thirty-one million, two hundred five thousand, one".