155145229 has 2 divisors, whose sum is σ = 155145230. Its totient is φ = 155145228.

The previous prime is 155145223. The next prime is 155145251. The reversal of 155145229 is 922541551.

155145229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106564329 + 48580900 = 10323^2 + 6970^2 .

It is an emirp because it is prime and its reverse (922541551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155145229 - 2⁵ = 155145197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155145194 and 155145203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155145223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77572614 + 77572615.

It is an arithmetic number, because the mean of its divisors is an integer number (77572615).

Almost surely, 2^155145229 is an apocalyptic number.

It is an amenable number.

155145229 is a deficient number, since it is larger than the sum of its proper divisors (1).

155145229 is an equidigital number, since it uses as much as digits as its factorization.

155145229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 34.

The square root of 155145229 is about 12455.7307694089. The cubic root of 155145229 is about 537.3362518322.

The spelling of 155145229 in words is "one hundred fifty-five million, one hundred forty-five thousand, two hundred twenty-nine".