155115004003 has 4 divisors (see below), whose sum is σ = 155117619360. Its totient is φ = 155112388648.

The previous prime is 155115003991. The next prime is 155115004013. The reversal of 155115004003 is 300400511551.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155115004003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155115004013) 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, 1216600 + ... + 1338037.

It is an arithmetic number, because the mean of its divisors is an integer number (38779404840).

Almost surely, 2^155115004003 is an apocalyptic number.

155115004003 is a deficient number, since it is larger than the sum of its proper divisors (2615357).

155115004003 is an equidigital number, since it uses as much as digits as its factorization.

155115004003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615356.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 155115004003 its reverse (300400511551), we get a palindrome (455515515554).

The spelling of 155115004003 in words is "one hundred fifty-five billion, one hundred fifteen million, four thousand, three".