43145220 has 48 divisors (see below), whose sum is σ = 121117248. Its totient is φ = 11475840.

The previous prime is 43145191. The next prime is 43145237. The reversal of 43145220 is 2254134.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32775 + ... + 34065.

It is an arithmetic number, because the mean of its divisors is an integer number (2523276).

Almost surely, 2^43145220 is an apocalyptic number.

It is an amenable number.

43145220 is an abundant number, since it is smaller than the sum of its proper divisors (77972028).

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

43145220 is a wasteful number, since it uses less digits than its factorization.

43145220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 43145220 is about 6568.5021123541. The cubic root of 43145220 is about 350.7337531743.

Adding to 43145220 its reverse (2254134), we get a palindrome (45399354).

It can be divided in two parts, 43145 and 220, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 43145220 in words is "forty-three million, one hundred forty-five thousand, two hundred twenty".