15500155 has 16 divisors (see below), whose sum is σ = 20947968. Its totient is φ = 10908000.

The previous prime is 15500153. The next prime is 15500171. The reversal of 15500155 is 55100551.

It is not a de Polignac number, because 15500155 - 2¹ = 15500153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15500153) 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, 2841 + ... + 6250.

It is an arithmetic number, because the mean of its divisors is an integer number (1309248).

Almost surely, 2^15500155 is an apocalyptic number.

15500155 is a deficient number, since it is larger than the sum of its proper divisors (5447813).

15500155 is a wasteful number, since it uses less digits than its factorization.

15500155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 15500155 is about 3937.0236219764. The cubic root of 15500155 is about 249.3323787143.

It can be divided in two parts, 15500 and 155, that multiplied together give a square (2402500 = 1550²).

The spelling of 15500155 in words is "fifteen million, five hundred thousand, one hundred fifty-five".