155430047 has 2 divisors, whose sum is σ = 155430048. Its totient is φ = 155430046.

The previous prime is 155430029. The next prime is 155430071. The reversal of 155430047 is 740034551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155430047 - 2⁶ = 155429983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155430097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77715023 + 77715024.

It is an arithmetic number, because the mean of its divisors is an integer number (77715024).

Almost surely, 2^155430047 is an apocalyptic number.

155430047 is a deficient number, since it is larger than the sum of its proper divisors (1).

155430047 is an equidigital number, since it uses as much as digits as its factorization.

155430047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 155430047 is about 12467.1587380606. The cubic root of 155430047 is about 537.6648675429.

Adding to 155430047 its reverse (740034551), we get a palindrome (895464598).

The spelling of 155430047 in words is "one hundred fifty-five million, four hundred thirty thousand, forty-seven".