13772155 has 4 divisors (see below), whose sum is σ = 16526592. Its totient is φ = 11017720.

The previous prime is 13772123. The next prime is 13772167. The reversal of 13772155 is 55127731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55127731 = 109 ⋅505759.

It is not a de Polignac number, because 13772155 - 2⁵ = 13772123 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377211 + ... + 1377220.

It is an arithmetic number, because the mean of its divisors is an integer number (4131648).

Almost surely, 2^13772155 is an apocalyptic number.

13772155 is a deficient number, since it is larger than the sum of its proper divisors (2754437).

13772155 is an equidigital number, since it uses as much as digits as its factorization.

13772155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754436.

The product of its digits is 7350, while the sum is 31.

The square root of 13772155 is about 3711.0854207361. The cubic root of 13772155 is about 239.6995952090.

Adding to 13772155 its reverse (55127731), we get a palindrome (68899886).

The spelling of 13772155 in words is "thirteen million, seven hundred seventy-two thousand, one hundred fifty-five".