2157803833 has 2 divisors, whose sum is σ = 2157803834. Its totient is φ = 2157803832.

The previous prime is 2157803821. The next prime is 2157803909. The reversal of 2157803833 is 3383087512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1629171769 + 528632064 = 40363^2 + 22992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157803833 is a prime.

It is a super-2 number, since 2×2157803833² = 9312234763418983778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2157803803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078901916 + 1078901917.

It is an arithmetic number, because the mean of its divisors is an integer number (1078901917).

Almost surely, 2^2157803833 is an apocalyptic number.

It is an amenable number.

2157803833 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157803833 is an equidigital number, since it uses as much as digits as its factorization.

2157803833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2157803833 is about 46452.1671507369. The cubic root of 2157803833 is about 1292.2225637552. Note that the first 3 decimals are identical.

The spelling of 2157803833 in words is "two billion, one hundred fifty-seven million, eight hundred three thousand, eight hundred thirty-three".