2155532123293 has 2 divisors, whose sum is σ = 2155532123294. Its totient is φ = 2155532123292.

The previous prime is 2155532123291. The next prime is 2155532123351. The reversal of 2155532123293 is 3923212355512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2133080697049 + 22451426244 = 1460507^2 + 149838^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155532123293 - 2¹ = 2155532123291 is a prime.

Together with 2155532123291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155532123291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077766061646 + 1077766061647.

It is an arithmetic number, because the mean of its divisors is an integer number (1077766061647).

Almost surely, 2^{2155532123293} is an apocalyptic number.

It is an amenable number.

2155532123293 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155532123293 is an equidigital number, since it uses as much as digits as its factorization.

2155532123293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 43.

The spelling of 2155532123293 in words is "two trillion, one hundred fifty-five billion, five hundred thirty-two million, one hundred twenty-three thousand, two hundred ninety-three".