155313497 has 2 divisors, whose sum is σ = 155313498. Its totient is φ = 155313496.

The previous prime is 155313493. The next prime is 155313523. The reversal of 155313497 is 794313551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154281241 + 1032256 = 12421^2 + 1016^2 .

It is an emirp because it is prime and its reverse (794313551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155313497 - 2² = 155313493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155313497.

It is not a weakly prime, because it can be changed into another prime (155313491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77656748 + 77656749.

It is an arithmetic number, because the mean of its divisors is an integer number (77656749).

Almost surely, 2^155313497 is an apocalyptic number.

It is an amenable number.

155313497 is a deficient number, since it is larger than the sum of its proper divisors (1).

155313497 is an equidigital number, since it uses as much as digits as its factorization.

155313497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 155313497 is about 12462.4835807314. The cubic root of 155313497 is about 537.5304437056.

The spelling of 155313497 in words is "one hundred fifty-five million, three hundred thirteen thousand, four hundred ninety-seven".