2009553 has 32 divisors (see below), whose sum is σ = 3499776. Its totient is φ = 995328.

The previous prime is 2009543. The next prime is 2009593. The reversal of 2009553 is 3559002.

It is not a de Polignac number, because 2009553 - 2⁴ = 2009537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2009503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4425 + ... + 4857.

It is an arithmetic number, because the mean of its divisors is an integer number (109368).

2^2009553 is an apocalyptic number.

It is an amenable number.

2009553 is a deficient number, since it is larger than the sum of its proper divisors (1490223).

2009553 is a wasteful number, since it uses less digits than its factorization.

2009553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 2009553 is about 1417.5870343651. The cubic root of 2009553 is about 126.1923868748.

The spelling of 2009553 in words is "two million, nine thousand, five hundred fifty-three".