155315503 has 16 divisors (see below), whose sum is σ = 188112960. Its totient is φ = 125395200.

The previous prime is 155315497. The next prime is 155315507. The reversal of 155315503 is 305513551.

It is not a de Polignac number, because 155315503 - 2¹⁷ = 155184431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155315507) 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, 1008 + ... + 17653.

It is an arithmetic number, because the mean of its divisors is an integer number (11757060).

Almost surely, 2^155315503 is an apocalyptic number.

155315503 is a deficient number, since it is larger than the sum of its proper divisors (32797457).

155315503 is a wasteful number, since it uses less digits than its factorization.

155315503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18738.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 155315503 is about 12462.5640620219. The cubic root of 155315503 is about 537.5327579098.

The spelling of 155315503 in words is "one hundred fifty-five million, three hundred fifteen thousand, five hundred three".