2001000144 has 80 divisors (see below), whose sum is σ = 6072986304. Its totient is φ = 559718400.

The previous prime is 2001000139. The next prime is 2001000151. The reversal of 2001000144 is 4410001002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138897 + ... + 152624.

Almost surely, 2^2001000144 is an apocalyptic number.

2001000144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001000144 is an abundant number, since it is smaller than the sum of its proper divisors (4071986160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001000144 is a wasteful number, since it uses less digits than its factorization.

2001000144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291556 (or 291550 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2001000144 is about 44732.5401022567. The cubic root of 2001000144 is about 1260.1310319765.

Adding to 2001000144 its reverse (4410001002), we get a palindrome (6411001146).

The spelling of 2001000144 in words is "two billion, one million, one hundred forty-four", and thus it is an aban number.