155430161 has 2 divisors, whose sum is σ = 155430162. Its totient is φ = 155430160.

The previous prime is 155430103. The next prime is 155430173. The reversal of 155430161 is 161034551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 58997761 = 9820^2 + 7681^2 .

It is an emirp because it is prime and its reverse (161034551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155430161 - 2⁶ = 155430097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155430161.

It is not a weakly prime, because it can be changed into another prime (155430361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77715080 + 77715081.

It is an arithmetic number, because the mean of its divisors is an integer number (77715081).

Almost surely, 2^155430161 is an apocalyptic number.

It is an amenable number.

155430161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155430161 is an equidigital number, since it uses as much as digits as its factorization.

155430161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 155430161 is about 12467.1633100718. The cubic root of 155430161 is about 537.6649989927.

The spelling of 155430161 in words is "one hundred fifty-five million, four hundred thirty thousand, one hundred sixty-one".