2156155 has 8 divisors (see below), whose sum is σ = 2631600. Its totient is φ = 1695456.

The previous prime is 2156123. The next prime is 2156159. The reversal of 2156155 is 5516512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156155 - 2⁵ = 2156123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (328950).

2^2156155 is an apocalyptic number.

2156155 is a deficient number, since it is larger than the sum of its proper divisors (475445).

2156155 is an equidigital number, since it uses as much as digits as its factorization.

2156155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373.

The product of its digits is 1500, while the sum is 25.

The square root of 2156155 is about 1468.3851674544. The cubic root of 2156155 is about 129.1893339801.

The spelling of 2156155 in words is "two million, one hundred fifty-six thousand, one hundred fifty-five".