172155743443 has 2 divisors, whose sum is σ = 172155743444. Its totient is φ = 172155743442.

The previous prime is 172155743423. The next prime is 172155743453. The reversal of 172155743443 is 344347551271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172155743443 - 2¹³ = 172155735251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172155743393 and 172155743402.

It is not a weakly prime, because it can be changed into another prime (172155743423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86077871721 + 86077871722.

It is an arithmetic number, because the mean of its divisors is an integer number (86077871722).

Almost surely, 2^172155743443 is an apocalyptic number.

172155743443 is a deficient number, since it is larger than the sum of its proper divisors (1).

172155743443 is an equidigital number, since it uses as much as digits as its factorization.

172155743443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 46.

The spelling of 172155743443 in words is "one hundred seventy-two billion, one hundred fifty-five million, seven hundred forty-three thousand, four hundred forty-three".