2001131144 has 32 divisors (see below), whose sum is σ = 3771495000. Its totient is φ = 995415552.

The previous prime is 2001131131. The next prime is 2001131159. The reversal of 2001131144 is 4411311002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1252452100 + 748679044 = 35390^2 + 27362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907132 + ... + 1908180.

Almost surely, 2^2001131144 is an apocalyptic number.

It is an amenable number.

2001131144 is a deficient number, since it is larger than the sum of its proper divisors (1770363856).

2001131144 is a wasteful number, since it uses less digits than its factorization.

2001131144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2001131144 is about 44734.0043367459. The cubic root of 2001131144 is about 1260.1585304857.

Adding to 2001131144 its reverse (4411311002), we get a palindrome (6412442146).

The spelling of 2001131144 in words is "two billion, one million, one hundred thirty-one thousand, one hundred forty-four".