4001543442 has 48 divisors (see below), whose sum is σ = 9429435288. Its totient is φ = 1219046400.

The previous prime is 4001543411. The next prime is 4001543459. The reversal of 4001543442 is 2443451004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3772293561 + 229249881 = 61419^2 + 15141^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61023 + ... + 108290.

Almost surely, 2^4001543442 is an apocalyptic number.

4001543442 is an abundant number, since it is smaller than the sum of its proper divisors (5427891846).

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

4001543442 is a wasteful number, since it uses less digits than its factorization.

4001543442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169435 (or 169432 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 4001543442 is about 63257.7540069200. The cubic root of 4001543442 is about 1587.6051975011.

Adding to 4001543442 its reverse (2443451004), we get a palindrome (6444994446).

The spelling of 4001543442 in words is "four billion, one million, five hundred forty-three thousand, four hundred forty-two".