201231003 has 4 divisors (see below), whose sum is σ = 268308008. Its totient is φ = 134154000.

The previous prime is 201231001. The next prime is 201231007. The reversal of 201231003 is 300132102.

It is a happy number.

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

It is not a de Polignac number, because 201231003 - 2¹ = 201231001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201231003.

It is not an unprimeable number, because it can be changed into a prime (201231001) 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, 33538498 + ... + 33538503.

It is an arithmetic number, because the mean of its divisors is an integer number (67077002).

Almost surely, 2^201231003 is an apocalyptic number.

201231003 is a deficient number, since it is larger than the sum of its proper divisors (67077005).

201231003 is an equidigital number, since it uses as much as digits as its factorization.

201231003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67077004.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 201231003 is about 14185.5913870378. The cubic root of 201231003 is about 586.0009192482. Note that the first 3 decimals are identical.

Adding to 201231003 its reverse (300132102), we get a palindrome (501363105).

The spelling of 201231003 in words is "two hundred one million, two hundred thirty-one thousand, three".