155023543 has 2 divisors, whose sum is σ = 155023544. Its totient is φ = 155023542.

The previous prime is 155023537. The next prime is 155023553. The reversal of 155023543 is 345320551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155023543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155023553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77511771 + 77511772.

It is an arithmetic number, because the mean of its divisors is an integer number (77511772).

Almost surely, 2^155023543 is an apocalyptic number.

155023543 is a deficient number, since it is larger than the sum of its proper divisors (1).

155023543 is an equidigital number, since it uses as much as digits as its factorization.

155023543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155023543 is about 12450.8450717210. The cubic root of 155023543 is about 537.1957310183.

The spelling of 155023543 in words is "one hundred fifty-five million, twenty-three thousand, five hundred forty-three".