2155410 has 48 divisors (see below), whose sum is σ = 5818176. Its totient is φ = 574128.

The previous prime is 2155409. The next prime is 2155423. The reversal of 2155410 is 145512.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1987 + ... + 2873.

It is an arithmetic number, because the mean of its divisors is an integer number (121212).

2^2155410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2909088).

2155410 is an abundant number, since it is smaller than the sum of its proper divisors (3662766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155410 is an equidigital number, since it uses as much as digits as its factorization.

2155410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2155410 is about 1468.1314655030. The cubic root of 2155410 is about 129.1744529934.

It can be divided in two parts, 215 and 5410, that added together give a square (5625 = 75²).

The spelling of 2155410 in words is "two million, one hundred fifty-five thousand, four hundred ten".