2001554145 has 40 divisors (see below), whose sum is σ = 3776826240. Its totient is φ = 1011307680.

The previous prime is 2001554141. The next prime is 2001554147. The reversal of 2001554145 is 5414551002.

It is not a de Polignac number, because 2001554145 - 2² = 2001554141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2001554141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 122361 + ... + 137750.

It is an arithmetic number, because the mean of its divisors is an integer number (94420656).

Almost surely, 2^2001554145 is an apocalyptic number.

It is an amenable number.

2001554145 is a deficient number, since it is larger than the sum of its proper divisors (1775272095).

2001554145 is a wasteful number, since it uses less digits than its factorization.

2001554145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260147 (or 260138 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2001554145 is about 44738.7320450636. The cubic root of 2001554145 is about 1260.2473153988.

The spelling of 2001554145 in words is "two billion, one million, five hundred fifty-four thousand, one hundred forty-five".