2155450 has 24 divisors (see below), whose sum is σ = 4374720. Its totient is φ = 783600.

The previous prime is 2155429. The next prime is 2155451. The reversal of 2155450 is 545512.

2155450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2155451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (182280).

2^2155450 is an apocalyptic number.

2155450 is an abundant number, since it is smaller than the sum of its proper divisors (2219270).

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

2155450 is a wasteful number, since it uses less digits than its factorization.

2155450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2155450 is about 1468.1450881980. The cubic root of 2155450 is about 129.1752520597.

It can be divided in two parts, 215 and 5450, that added together give a palindrome (5665).

The spelling of 2155450 in words is "two million, one hundred fifty-five thousand, four hundred fifty".