2156823324 has 36 divisors (see below), whose sum is σ = 5508184864. Its totient is φ = 711528192.

The previous prime is 2156823311. The next prime is 2156823329. The reversal of 2156823324 is 4233286512.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156823329) 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 11 ways as a sum of consecutive naturals, for example, 305332 + ... + 312315.

Almost surely, 2^2156823324 is an apocalyptic number.

It is an amenable number.

2156823324 is an abundant number, since it is smaller than the sum of its proper divisors (3351361540).

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

2156823324 is a wasteful number, since it uses less digits than its factorization.

2156823324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617754 (or 617749 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 2156823324 is about 46441.6119875269. The cubic root of 2156823324 is about 1292.0268048703.

The spelling of 2156823324 in words is "two billion, one hundred fifty-six million, eight hundred twenty-three thousand, three hundred twenty-four".