2154155 has 8 divisors (see below), whose sum is σ = 2737152. Its totient is φ = 1621888.

The previous prime is 2154143. The next prime is 2154161. The reversal of 2154155 is 5514512.

It is a happy number.

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 2154155 - 2¹⁴ = 2137771 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154155.

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, 12587 + ... + 12756.

It is an arithmetic number, because the mean of its divisors is an integer number (342144).

2^2154155 is an apocalyptic number.

2154155 is a deficient number, since it is larger than the sum of its proper divisors (582997).

2154155 is a wasteful number, since it uses less digits than its factorization.

2154155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25365.

The product of its digits is 1000, while the sum is 23.

The square root of 2154155 is about 1467.7039892294. The cubic root of 2154155 is about 129.1493772673.

Adding to 2154155 its reverse (5514512), we get a palindrome (7668667).

The spelling of 2154155 in words is "two million, one hundred fifty-four thousand, one hundred fifty-five".