155136203 has 4 divisors (see below), whose sum is σ = 164261880. Its totient is φ = 146010528.

The previous prime is 155136187. The next prime is 155136209. The reversal of 155136203 is 302631551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155136203 - 2⁴ = 155136187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155136209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4562813 + ... + 4562846.

It is an arithmetic number, because the mean of its divisors is an integer number (41065470).

Almost surely, 2^155136203 is an apocalyptic number.

155136203 is a deficient number, since it is larger than the sum of its proper divisors (9125677).

155136203 is an equidigital number, since it uses as much as digits as its factorization.

155136203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9125676.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 155136203 is about 12455.3684409575. The cubic root of 155136203 is about 537.3258312925.

Adding to 155136203 its reverse (302631551), we get a palindrome (457767754).

The spelling of 155136203 in words is "one hundred fifty-five million, one hundred thirty-six thousand, two hundred three".