231020003 has 4 divisors (see below), whose sum is σ = 238986240. Its totient is φ = 223053768.

The previous prime is 231019991. The next prime is 231020047. The reversal of 231020003 is 300020132.

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

It is a cyclic number.

It is not a de Polignac number, because 231020003 - 2¹⁶ = 230954467 is a prime.

It is a super-2 number, since 2×231020003² = 106740483572240018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231020903) 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, 3983075 + ... + 3983132.

It is an arithmetic number, because the mean of its divisors is an integer number (59746560).

Almost surely, 2^231020003 is an apocalyptic number.

231020003 is a deficient number, since it is larger than the sum of its proper divisors (7966237).

231020003 is an equidigital number, since it uses as much as digits as its factorization.

231020003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966236.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 231020003 is about 15199.3421897133. The cubic root of 231020003 is about 613.5969540259.

Adding to 231020003 its reverse (300020132), we get a palindrome (531040135).

The spelling of 231020003 in words is "two hundred thirty-one million, twenty thousand, three".