155047001 has 2 divisors, whose sum is σ = 155047002. Its totient is φ = 155047000.

The previous prime is 155046971. The next prime is 155047007. The reversal of 155047001 is 100740551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155027401 + 19600 = 12451^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155047001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155047007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77523500 + 77523501.

It is an arithmetic number, because the mean of its divisors is an integer number (77523501).

Almost surely, 2^155047001 is an apocalyptic number.

It is an amenable number.

155047001 is a deficient number, since it is larger than the sum of its proper divisors (1).

155047001 is an equidigital number, since it uses as much as digits as its factorization.

155047001 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 23.

The square root of 155047001 is about 12451.7870604986. The cubic root of 155047001 is about 537.2228256167. Note that the first 3 decimals are identical.

Adding to 155047001 its reverse (100740551), we get a palindrome (255787552).

The spelling of 155047001 in words is "one hundred fifty-five million, forty-seven thousand, one".