155143403 has 2 divisors, whose sum is σ = 155143404. Its totient is φ = 155143402.

The previous prime is 155143369. The next prime is 155143409. The reversal of 155143403 is 304341551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155143403 is a prime.

It is not a weakly prime, because it can be changed into another prime (155143409) 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, 77571701 + 77571702.

It is an arithmetic number, because the mean of its divisors is an integer number (77571702).

Almost surely, 2^155143403 is an apocalyptic number.

155143403 is a deficient number, since it is larger than the sum of its proper divisors (1).

155143403 is an equidigital number, since it uses as much as digits as its factorization.

155143403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 155143403 is about 12455.6574695999. The cubic root of 155143403 is about 537.3341437432.

Adding to 155143403 its reverse (304341551), we get a palindrome (459484954).

The spelling of 155143403 in words is "one hundred fifty-five million, one hundred forty-three thousand, four hundred three".