2161231003 has 8 divisors (see below), whose sum is σ = 2239688880. Its totient is φ = 2083035360.

The previous prime is 2161230997. The next prime is 2161231021. The reversal of 2161231003 is 3001321612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161231003 - 2⁵ = 2161230971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161231103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48700 + ... + 81817.

It is an arithmetic number, because the mean of its divisors is an integer number (279961110).

Almost surely, 2^2161231003 is an apocalyptic number.

2161231003 is a deficient number, since it is larger than the sum of its proper divisors (78457877).

2161231003 is a wasteful number, since it uses less digits than its factorization.

2161231003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131117.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2161231003 is about 46489.0417517935. The cubic root of 2161231003 is about 1292.9063336400.

Adding to 2161231003 its reverse (3001321612), we get a palindrome (5162552615).

The spelling of 2161231003 in words is "two billion, one hundred sixty-one million, two hundred thirty-one thousand, three".