155607230173 has 2 divisors, whose sum is σ = 155607230174. Its totient is φ = 155607230172.

The previous prime is 155607230147. The next prime is 155607230183. The reversal of 155607230173 is 371032706551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122473401444 + 33133828729 = 349962^2 + 182027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155607230173 is a prime.

It is a super-2 number, since 2×155607230173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155607230113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77803615086 + 77803615087.

It is an arithmetic number, because the mean of its divisors is an integer number (77803615087).

Almost surely, 2^155607230173 is an apocalyptic number.

It is an amenable number.

155607230173 is a deficient number, since it is larger than the sum of its proper divisors (1).

155607230173 is an equidigital number, since it uses as much as digits as its factorization.

155607230173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 40.

The spelling of 155607230173 in words is "one hundred fifty-five billion, six hundred seven million, two hundred thirty thousand, one hundred seventy-three".