2155522673 has 2 divisors, whose sum is σ = 2155522674. Its totient is φ = 2155522672.

The previous prime is 2155522639. The next prime is 2155522711. The reversal of 2155522673 is 3762255512.

It is an a-pointer prime, because the next prime (2155522711) can be obtained adding 2155522673 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1984880704 + 170641969 = 44552^2 + 13063^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155522673 - 2²² = 2151328369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155552673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077761336 + 1077761337.

It is an arithmetic number, because the mean of its divisors is an integer number (1077761337).

Almost surely, 2^2155522673 is an apocalyptic number.

It is an amenable number.

2155522673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155522673 is an equidigital number, since it uses as much as digits as its factorization.

2155522673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 38.

The square root of 2155522673 is about 46427.6067981110. The cubic root of 2155522673 is about 1291.7670379794.

The spelling of 2155522673 in words is "two billion, one hundred fifty-five million, five hundred twenty-two thousand, six hundred seventy-three".