2145255424 has 72 divisors (see below), whose sum is σ = 4624202520. Its totient is φ = 989331456.

The previous prime is 2145255421. The next prime is 2145255443. The reversal of 2145255424 is 4245525412.

It is a self number, because there is not a number n which added to its sum of digits gives 2145255424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145255421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703307 + ... + 1704565.

It is an arithmetic number, because the mean of its divisors is an integer number (64225035).

Almost surely, 2^2145255424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145255424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312101260).

2145255424 is an abundant number, since it is smaller than the sum of its proper divisors (2478947096).

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

2145255424 is an frugal number, since it uses more digits than its factorization.

2145255424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306 (or 1274 counting only the distinct ones).

The product of its digits is 64000, while the sum is 34.

The square root of 2145255424 is about 46316.9021416588. The cubic root of 2145255424 is about 1289.7127786318.

The spelling of 2145255424 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, four hundred twenty-four".