2156532009 has 8 divisors (see below), whose sum is σ = 2898017280. Its totient is φ = 1426367376.

The previous prime is 2156531929. The next prime is 2156532023. The reversal of 2156532009 is 9002356512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2156532009 - 2¹¹ = 2156529961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156532089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2829714 + ... + 2830475.

It is an arithmetic number, because the mean of its divisors is an integer number (362252160).

Almost surely, 2^2156532009 is an apocalyptic number.

It is an amenable number.

2156532009 is a deficient number, since it is larger than the sum of its proper divisors (741485271).

2156532009 is a wasteful number, since it uses less digits than its factorization.

2156532009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660319.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 2156532009 is about 46438.4755240738. The cubic root of 2156532009 is about 1291.9686323207.

The spelling of 2156532009 in words is "two billion, one hundred fifty-six million, five hundred thirty-two thousand, nine".