2156520233 has 32 divisors (see below), whose sum is σ = 2577312000. Its totient is φ = 1803005568.

The previous prime is 2156520211. The next prime is 2156520271. The reversal of 2156520233 is 3320256512.

It is not a de Polignac number, because 2156520233 - 2¹² = 2156516137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2156520196 and 2156520205.

It is not an unprimeable number, because it can be changed into a prime (2156520283) 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, 5689838 + ... + 5690216.

It is an arithmetic number, because the mean of its divisors is an integer number (80541000).

Almost surely, 2^2156520233 is an apocalyptic number.

It is an amenable number.

2156520233 is a deficient number, since it is larger than the sum of its proper divisors (420791767).

2156520233 is an equidigital number, since it uses as much as digits as its factorization.

2156520233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 2156520233 is about 46438.3487324862. The cubic root of 2156520233 is about 1291.9662806668.

Adding to 2156520233 its reverse (3320256512), we get a palindrome (5476776745).

The spelling of 2156520233 in words is "two billion, one hundred fifty-six million, five hundred twenty thousand, two hundred thirty-three".