155012203 has 16 divisors (see below), whose sum is σ = 174885120. Its totient is φ = 136658016.

The previous prime is 155012177. The next prime is 155012213. The reversal of 155012203 is 302210551.

It is a cyclic number.

It is not a de Polignac number, because 155012203 - 2¹⁷ = 154881131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (155012213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11376 + ... + 20962.

It is an arithmetic number, because the mean of its divisors is an integer number (10930320).

Almost surely, 2^155012203 is an apocalyptic number.

155012203 is a deficient number, since it is larger than the sum of its proper divisors (19872917).

155012203 is a wasteful number, since it uses less digits than its factorization.

155012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9666.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155012203 is about 12450.3896726167. The cubic root of 155012203 is about 537.1826320442.

Adding to 155012203 its reverse (302210551), we get a palindrome (457222754).

The spelling of 155012203 in words is "one hundred fifty-five million, twelve thousand, two hundred three".