201605231003 has 8 divisors (see below), whose sum is σ = 220072284480. Its totient is φ = 183161395080.

The previous prime is 201605230997. The next prime is 201605231041. The reversal of 201605231003 is 300132506102.

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 201605231003 - 2¹⁴ = 201605214619 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 201605231003.

It is not an unprimeable number, because it can be changed into a prime (201605231903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5786225 + ... + 5820962.

It is an arithmetic number, because the mean of its divisors is an integer number (27509035560).

Almost surely, 2^201605231003 is an apocalyptic number.

201605231003 is a deficient number, since it is larger than the sum of its proper divisors (18467053477).

201605231003 is a wasteful number, since it uses less digits than its factorization.

201605231003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11608777.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 201605231003 its reverse (300132506102), we get a palindrome (501737737105).

The spelling of 201605231003 in words is "two hundred one billion, six hundred five million, two hundred thirty-one thousand, three".