8161155 has 28 divisors (see below), whose sum is σ = 14689920. Its totient is φ = 4350672.

The previous prime is 8161121. The next prime is 8161183. The reversal of 8161155 is 5511618.

It is not a de Polignac number, because 8161155 - 2¹⁸ = 7899011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2526 + ... + 4764.

It is an arithmetic number, because the mean of its divisors is an integer number (524640).

Almost surely, 2^8161155 is an apocalyptic number.

8161155 is a deficient number, since it is larger than the sum of its proper divisors (6528765).

8161155 is an equidigital number, since it uses as much as digits as its factorization.

8161155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2247 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 8161155 is about 2856.7735297009. The cubic root of 8161155 is about 201.3340402321.

The spelling of 8161155 in words is "eight million, one hundred sixty-one thousand, one hundred fifty-five".