155130449 has 2 divisors, whose sum is σ = 155130450. Its totient is φ = 155130448.

The previous prime is 155130431. The next prime is 155130461. The reversal of 155130449 is 944031551.

155130449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 4700224 = 12265^2 + 2168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155130449 is a prime.

It is not a weakly prime, because it can be changed into another prime (155130499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77565224 + 77565225.

It is an arithmetic number, because the mean of its divisors is an integer number (77565225).

Almost surely, 2^155130449 is an apocalyptic number.

It is an amenable number.

155130449 is a deficient number, since it is larger than the sum of its proper divisors (1).

155130449 is an equidigital number, since it uses as much as digits as its factorization.

155130449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 155130449 is about 12455.1374540789. The cubic root of 155130449 is about 537.3191880740.

The spelling of 155130449 in words is "one hundred fifty-five million, one hundred thirty thousand, four hundred forty-nine".