155195297 has 2 divisors, whose sum is σ = 155195298. Its totient is φ = 155195296.

The previous prime is 155195273. The next prime is 155195317. The reversal of 155195297 is 792591551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 44609041 = 10516^2 + 6679^2 .

It is an emirp because it is prime and its reverse (792591551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155195297 - 2²⁰ = 154146721 is a prime.

It is equal to p_8719919 and since 155195297 and 8719919 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155195497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77597648 + 77597649.

It is an arithmetic number, because the mean of its divisors is an integer number (77597649).

Almost surely, 2^155195297 is an apocalyptic number.

It is an amenable number.

155195297 is a deficient number, since it is larger than the sum of its proper divisors (1).

155195297 is an equidigital number, since it uses as much as digits as its factorization.

155195297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141750, while the sum is 44.

The square root of 155195297 is about 12457.7404452011. The cubic root of 155195297 is about 537.3940481264.

The spelling of 155195297 in words is "one hundred fifty-five million, one hundred ninety-five thousand, two hundred ninety-seven".