43220145 has 8 divisors (see below), whose sum is σ = 69152256. Its totient is φ = 23050736.

The previous prime is 43220143. The next prime is 43220183. The reversal of 43220145 is 54102234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43220145 - 2¹ = 43220143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43220141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440657 + ... + 1440686.

It is an arithmetic number, because the mean of its divisors is an integer number (8644032).

Almost surely, 2^43220145 is an apocalyptic number.

It is an amenable number.

43220145 is a deficient number, since it is larger than the sum of its proper divisors (25932111).

43220145 is a wasteful number, since it uses less digits than its factorization.

43220145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881351.

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

The square root of 43220145 is about 6574.2029935194. The cubic root of 43220145 is about 350.9366611630.

Adding to 43220145 its reverse (54102234), we get a palindrome (97322379).

It can be divided in two parts, 43220 and 145, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 43220145 in words is "forty-three million, two hundred twenty thousand, one hundred forty-five".