2001181053 has 4 divisors (see below), whose sum is σ = 2668241408. Its totient is φ = 1334120700.

The previous prime is 2001181051. The next prime is 2001181073. The reversal of 2001181053 is 3501811002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2001181053 - 2¹ = 2001181051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001181051) 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, 333530173 + ... + 333530178.

It is an arithmetic number, because the mean of its divisors is an integer number (667060352).

Almost surely, 2^2001181053 is an apocalyptic number.

It is an amenable number.

2001181053 is a deficient number, since it is larger than the sum of its proper divisors (667060355).

2001181053 is an equidigital number, since it uses as much as digits as its factorization.

2001181053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667060354.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 2001181053 is about 44734.5621751236. The cubic root of 2001181053 is about 1260.1690066822.

Adding to 2001181053 its reverse (3501811002), we get a palindrome (5502992055).

The spelling of 2001181053 in words is "two billion, one million, one hundred eighty-one thousand, fifty-three".