2156500506 has 8 divisors (see below), whose sum is σ = 4313001024. Its totient is φ = 718833500.

The previous prime is 2156500501. The next prime is 2156500543. The reversal of 2156500506 is 6050056512.

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

2156500506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2156500501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179708370 + ... + 179708381.

It is an arithmetic number, because the mean of its divisors is an integer number (539125128).

Almost surely, 2^2156500506 is an apocalyptic number.

2156500506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2156500506 is a wasteful number, since it uses less digits than its factorization.

2156500506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359416756.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2156500506 is about 46438.1363321139. The cubic root of 2156500506 is about 1291.9623411881.

The spelling of 2156500506 in words is "two billion, one hundred fifty-six million, five hundred thousand, five hundred six".