2121550 has 24 divisors (see below), whose sum is σ = 3986352. Its totient is φ = 840000.

The previous prime is 2121529. The next prime is 2121569. The reversal of 2121550 is 551212.

2121550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 7410 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (166098).

2^2121550 is an apocalyptic number.

2121550 is a deficient number, since it is larger than the sum of its proper divisors (1864802).

2121550 is a wasteful number, since it uses less digits than its factorization.

2121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2121550 is about 1456.5541527866. The cubic root of 2121550 is about 128.4944659913.

Adding to 2121550 its reverse (551212), we get a palindrome (2672762).

The spelling of 2121550 in words is "two million, one hundred twenty-one thousand, five hundred fifty".