15501255 has 32 divisors (see below), whose sum is σ = 30924288. Its totient is φ = 6441600.

The previous prime is 15501253. The next prime is 15501293. The reversal of 15501255 is 55210551.

It is not a de Polignac number, because 15501255 - 2¹ = 15501253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15501251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5556 + ... + 7865.

It is an arithmetic number, because the mean of its divisors is an integer number (966384).

Almost surely, 2^15501255 is an apocalyptic number.

15501255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15501255 is a deficient number, since it is larger than the sum of its proper divisors (15423033).

15501255 is a wasteful number, since it uses less digits than its factorization.

15501255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13447.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 15501255 is about 3937.1633189392. The cubic root of 15501255 is about 249.3382767011.

The spelling of 15501255 in words is "fifteen million, five hundred one thousand, two hundred fifty-five".