155100005 has 4 divisors (see below), whose sum is σ = 186120012. Its totient is φ = 124080000.

The previous prime is 155099969. The next prime is 155100013. The reversal of 155100005 is 500001551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500001551 = 7 ⋅71428793.

It can be written as a sum of positive squares in 2 ways, for example, as 91833889 + 63266116 = 9583^2 + 7954^2 .

It is not a de Polignac number, because 155100005 - 2⁶ = 155099941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15509996 + ... + 15510005.

It is an arithmetic number, because the mean of its divisors is an integer number (46530003).

Almost surely, 2^155100005 is an apocalyptic number.

It is an amenable number.

155100005 is a deficient number, since it is larger than the sum of its proper divisors (31020007).

155100005 is an equidigital number, since it uses as much as digits as its factorization.

155100005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31020006.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 155100005 is about 12453.9152478247. The cubic root of 155100005 is about 537.2840365490.

Adding to 155100005 its reverse (500001551), we get a palindrome (655101556).

The spelling of 155100005 in words is "one hundred fifty-five million, one hundred thousand, five".