2155732361 has 2 divisors, whose sum is σ = 2155732362. Its totient is φ = 2155732360.

The previous prime is 2155732331. The next prime is 2155732391. The reversal of 2155732361 is 1632375512.

2155732361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2155732331) and next prime (2155732391).

It can be written as a sum of positive squares in only one way, i.e., 2136195961 + 19536400 = 46219^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155732361 - 2¹⁰ = 2155731337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155732321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077866180 + 1077866181.

It is an arithmetic number, because the mean of its divisors is an integer number (1077866181).

Almost surely, 2^2155732361 is an apocalyptic number.

It is an amenable number.

2155732361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155732361 is an equidigital number, since it uses as much as digits as its factorization.

2155732361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 35.

The square root of 2155732361 is about 46429.8649685738. The cubic root of 2155732361 is about 1291.8089240716.

The spelling of 2155732361 in words is "two billion, one hundred fifty-five million, seven hundred thirty-two thousand, three hundred sixty-one".