2820155 has 16 divisors (see below), whose sum is σ = 3732960. Its totient is φ = 2032128.

The previous prime is 2820131. The next prime is 2820179. The reversal of 2820155 is 5510282.

2820155 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (2820131) and next prime (2820179).

It is a cyclic number.

It is not a de Polignac number, because 2820155 - 2⁸ = 2819899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2820155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2291 + ... + 3299.

It is an arithmetic number, because the mean of its divisors is an integer number (233310).

2^2820155 is an apocalyptic number.

2820155 is a deficient number, since it is larger than the sum of its proper divisors (912805).

2820155 is a wasteful number, since it uses less digits than its factorization.

2820155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2820155 is about 1679.3317123189. The cubic root of 2820155 is about 141.2833528674.

The spelling of 2820155 in words is "two million, eight hundred twenty thousand, one hundred fifty-five".