13875555 has 32 divisors (see below), whose sum is σ = 23814144. Its totient is φ = 6880896.

The previous prime is 13875551. The next prime is 13875557. The reversal of 13875555 is 55557831.

It is not a de Polignac number, because 13875555 - 2² = 13875551 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13875551) 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, 12222 + ... + 13308.

It is an arithmetic number, because the mean of its divisors is an integer number (744192).

Almost surely, 2^13875555 is an apocalyptic number.

13875555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13875555 is a deficient number, since it is larger than the sum of its proper divisors (9938589).

13875555 is a wasteful number, since it uses less digits than its factorization.

13875555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its digits is 105000, while the sum is 39.

The square root of 13875555 is about 3724.9906040150. The cubic root of 13875555 is about 240.2979805729.

It can be divided in two parts, 13875 and 555, that multiplied together give a square (7700625 = 2775²).

The spelling of 13875555 in words is "thirteen million, eight hundred seventy-five thousand, five hundred fifty-five".