155215223172323 has 2 divisors, whose sum is σ = 155215223172324. Its totient is φ = 155215223172322.

The previous prime is 155215223172301. The next prime is 155215223172367. The reversal of 155215223172323 is 323271322512551.

It is an a-pointer prime, because the next prime (155215223172367) can be obtained adding 155215223172323 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155215223172323 - 2¹⁸ = 155215222910179 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155215223172623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77607611586161 + 77607611586162.

It is an arithmetic number, because the mean of its divisors is an integer number (77607611586162).

Almost surely, 2^{155215223172323} is an apocalyptic number.

155215223172323 is a deficient number, since it is larger than the sum of its proper divisors (1).

155215223172323 is an equidigital number, since it uses as much as digits as its factorization.

155215223172323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 44.

Adding to 155215223172323 its reverse (323271322512551), we get a palindrome (478486545684874).

The spelling of 155215223172323 in words is "one hundred fifty-five trillion, two hundred fifteen billion, two hundred twenty-three million, one hundred seventy-two thousand, three hundred twenty-three".