2155554433 has 2 divisors, whose sum is σ = 2155554434. Its totient is φ = 2155554432.

The previous prime is 2155554431. The next prime is 2155554487. The reversal of 2155554433 is 3344555512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1292546304 + 863008129 = 35952^2 + 29377^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155554433 - 2¹ = 2155554431 is a prime.

Together with 2155554431, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2155554392 and 2155554401.

It is not a weakly prime, because it can be changed into another prime (2155554431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077777216 + 1077777217.

It is an arithmetic number, because the mean of its divisors is an integer number (1077777217).

Almost surely, 2^2155554433 is an apocalyptic number.

It is an amenable number.

2155554433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155554433 is an equidigital number, since it uses as much as digits as its factorization.

2155554433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180000, while the sum is 37.

The square root of 2155554433 is about 46427.9488347267. The cubic root of 2155554433 is about 1291.7733823524.

The spelling of 2155554433 in words is "two billion, one hundred fifty-five million, five hundred fifty-four thousand, four hundred thirty-three".