155386081 has 2 divisors, whose sum is σ = 155386082. Its totient is φ = 155386080.

The previous prime is 155386057. The next prime is 155386129. The reversal of 155386081 is 180683551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139712400 + 15673681 = 11820^2 + 3959^2 .

It is an emirp because it is prime and its reverse (180683551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155386081 - 2¹³ = 155377889 is a prime.

It is a super-2 number, since 2×155386081² = 48289668337077122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155386081.

It is not a weakly prime, because it can be changed into another prime (155386381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77693040 + 77693041.

It is an arithmetic number, because the mean of its divisors is an integer number (77693041).

Almost surely, 2^155386081 is an apocalyptic number.

It is an amenable number.

155386081 is a deficient number, since it is larger than the sum of its proper divisors (1).

155386081 is an equidigital number, since it uses as much as digits as its factorization.

155386081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 155386081 is about 12465.3953407022. The cubic root of 155386081 is about 537.6141669152.

The spelling of 155386081 in words is "one hundred fifty-five million, three hundred eighty-six thousand, eighty-one".