2155468493 has 2 divisors, whose sum is σ = 2155468494. Its totient is φ = 2155468492.

The previous prime is 2155468451. The next prime is 2155468517. The reversal of 2155468493 is 3948645512.

2155468493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250541769 + 904926724 = 35363^2 + 30082^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155468493 - 2⁶ = 2155468429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155468423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077734246 + 1077734247.

It is an arithmetic number, because the mean of its divisors is an integer number (1077734247).

Almost surely, 2^2155468493 is an apocalyptic number.

It is an amenable number.

2155468493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155468493 is an equidigital number, since it uses as much as digits as its factorization.

2155468493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The square root of 2155468493 is about 46427.0233053983. The cubic root of 2155468493 is about 1291.7562148466.

The spelling of 2155468493 in words is "two billion, one hundred fifty-five million, four hundred sixty-eight thousand, four hundred ninety-three".