155513103 has 4 divisors (see below), whose sum is σ = 207350808. Its totient is φ = 103675400.

The previous prime is 155513089. The next prime is 155513129. The reversal of 155513103 is 301315551.

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 155513103 - 2⁴ = 155513087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155513173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25918848 + ... + 25918853.

It is an arithmetic number, because the mean of its divisors is an integer number (51837702).

Almost surely, 2^155513103 is an apocalyptic number.

155513103 is a deficient number, since it is larger than the sum of its proper divisors (51837705).

155513103 is an equidigital number, since it uses as much as digits as its factorization.

155513103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51837704.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 155513103 is about 12470.4892847073. The cubic root of 155513103 is about 537.7606198169.

Adding to 155513103 its reverse (301315551), we get a palindrome (456828654).

The spelling of 155513103 in words is "one hundred fifty-five million, five hundred thirteen thousand, one hundred three".