2001554249 has 4 divisors (see below), whose sum is σ = 2001674436. Its totient is φ = 2001434064.

The previous prime is 2001554237. The next prime is 2001554251. The reversal of 2001554249 is 9424551002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 364542649 + 1637011600 = 19093^2 + 40460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001554249 - 2¹² = 2001550153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001554209) 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 3 ways as a sum of consecutive naturals, for example, 30134 + ... + 70079.

It is an arithmetic number, because the mean of its divisors is an integer number (500418609).

Almost surely, 2^2001554249 is an apocalyptic number.

It is an amenable number.

2001554249 is a deficient number, since it is larger than the sum of its proper divisors (120187).

2001554249 is a wasteful number, since it uses less digits than its factorization.

2001554249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120186.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2001554249 is about 44738.7332073674. The cubic root of 2001554249 is about 1260.2473372262.

The spelling of 2001554249 in words is "two billion, one million, five hundred fifty-four thousand, two hundred forty-nine".