155000047 has 2 divisors, whose sum is σ = 155000048. Its totient is φ = 155000046.

The previous prime is 155000039. The next prime is 155000057. The reversal of 155000047 is 740000551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155000047 - 2³ = 155000039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154999991 and 155000027.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155000057) 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, 77500023 + 77500024.

It is an arithmetic number, because the mean of its divisors is an integer number (77500024).

Almost surely, 2^155000047 is an apocalyptic number.

155000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

155000047 is an equidigital number, since it uses as much as digits as its factorization.

155000047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 155000047 is about 12449.9014855540. The cubic root of 155000047 is about 537.1685897889.

Adding to 155000047 its reverse (740000551), we get a palindrome (895000598).

The spelling of 155000047 in words is "one hundred fifty-five million, forty-seven", and thus it is an aban number.