2145443430 has 64 divisors (see below), whose sum is σ = 5565163968. Its totient is φ = 526202880.

The previous prime is 2145443413. The next prime is 2145443459. The reversal of 2145443430 is 343445412.

It is a super-2 number, since 2×2145443430² = 9205855022660329800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99802 + ... + 119378.

It is an arithmetic number, because the mean of its divisors is an integer number (86955687).

Almost surely, 2^2145443430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145443430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782581984).

2145443430 is an abundant number, since it is smaller than the sum of its proper divisors (3419720538).

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

2145443430 is a wasteful number, since it uses less digits than its factorization.

2145443430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19881.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 2145443430 is about 46318.9316586641. The cubic root of 2145443430 is about 1289.7504535018.

Adding to 2145443430 its reverse (343445412), we get a palindrome (2488888842).

The spelling of 2145443430 in words is "two billion, one hundred forty-five million, four hundred forty-three thousand, four hundred thirty".