2123155 has 8 divisors (see below), whose sum is σ = 2682000. Its totient is φ = 1609056.

The previous prime is 2123141. The next prime is 2123161. The reversal of 2123155 is 5513212.

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 2123155 - 2⁵ = 2123123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11080 + ... + 11269.

It is an arithmetic number, because the mean of its divisors is an integer number (335250).

2^2123155 is an apocalyptic number.

2123155 is a deficient number, since it is larger than the sum of its proper divisors (558845).

2123155 is a wasteful number, since it uses less digits than its factorization.

2123155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22373.

The product of its digits is 300, while the sum is 19.

The square root of 2123155 is about 1457.1050065112. The cubic root of 2123155 is about 128.5268608022.

Adding to 2123155 its reverse (5513212), we get a palindrome (7636367).

It can be divided in two parts, 2123 and 155, that added together give a triangular number (2278 = T₆₇).

The spelling of 2123155 in words is "two million, one hundred twenty-three thousand, one hundred fifty-five".