2156220033 has 8 divisors (see below), whose sum is σ = 3136320096. Its totient is φ = 1306800000.

The previous prime is 2156220019. The next prime is 2156220047. The reversal of 2156220033 is 3300226512.

It is an interprime number because it is at equal distance from previous prime (2156220019) and next prime (2156220047).

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

It is not a de Polignac number, because 2156220033 - 2⁸ = 2156219777 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2156219985 and 2156220012.

It is not an unprimeable number, because it can be changed into a prime (2156220083) 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, 32669968 + ... + 32670033.

It is an arithmetic number, because the mean of its divisors is an integer number (392040012).

Almost surely, 2^2156220033 is an apocalyptic number.

It is an amenable number.

2156220033 is a deficient number, since it is larger than the sum of its proper divisors (980100063).

2156220033 is a wasteful number, since it uses less digits than its factorization.

2156220033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65340015.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 2156220033 is about 46435.1163775865. The cubic root of 2156220033 is about 1291.9063281764.

Adding to 2156220033 its reverse (3300226512), we get a palindrome (5456446545).

The spelling of 2156220033 in words is "two billion, one hundred fifty-six million, two hundred twenty thousand, thirty-three".