2129550 has 24 divisors (see below), whose sum is σ = 5281656. Its totient is φ = 567840.

The previous prime is 2129549. The next prime is 2129551. The reversal of 2129550 is 559212.

2129550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2129549) and next prime (2129551).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2129550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129551) 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, 6949 + ... + 7248.

It is an arithmetic number, because the mean of its divisors is an integer number (220069).

2^2129550 is an apocalyptic number.

2129550 is an abundant number, since it is smaller than the sum of its proper divisors (3152106).

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

2129550 is a wasteful number, since it uses less digits than its factorization.

2129550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212 (or 14207 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2129550 is about 1459.2977763294. The cubic root of 2129550 is about 128.6557735803.

The spelling of 2129550 in words is "two million, one hundred twenty-nine thousand, five hundred fifty".