155345543 has 2 divisors, whose sum is σ = 155345544. Its totient is φ = 155345542.

The previous prime is 155345537. The next prime is 155345551. The reversal of 155345543 is 345543551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155345543 - 2⁶ = 155345479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155345503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77672771 + 77672772.

It is an arithmetic number, because the mean of its divisors is an integer number (77672772).

Almost surely, 2^155345543 is an apocalyptic number.

155345543 is a deficient number, since it is larger than the sum of its proper divisors (1).

155345543 is an equidigital number, since it uses as much as digits as its factorization.

155345543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 35.

The square root of 155345543 is about 12463.7692132035. The cubic root of 155345543 is about 537.5674109071.

The spelling of 155345543 in words is "one hundred fifty-five million, three hundred forty-five thousand, five hundred forty-three".