155240103 has 16 divisors (see below), whose sum is σ = 214552800. Its totient is φ = 99724800.

The previous prime is 155240093. The next prime is 155240117. The reversal of 155240103 is 301042551.

155240103 = T₃₉₇ + T₃₉₈ + ... + T₉₉₇.

It is not a de Polignac number, because 155240103 - 2¹² = 155236007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155240103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155240143) 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, 50803 + ... + 53771.

It is an arithmetic number, because the mean of its divisors is an integer number (13409550).

Almost surely, 2^155240103 is an apocalyptic number.

155240103 is a deficient number, since it is larger than the sum of its proper divisors (59312697).

155240103 is a wasteful number, since it uses less digits than its factorization.

155240103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155240103 is about 12459.5386351181. The cubic root of 155240103 is about 537.4457596610.

Adding to 155240103 its reverse (301042551), we get a palindrome (456282654).

The spelling of 155240103 in words is "one hundred fifty-five million, two hundred forty thousand, one hundred three".