4001231544 has 16 divisors (see below), whose sum is σ = 10003078920. Its totient is φ = 1333743840.

The previous prime is 4001231459. The next prime is 4001231557. The reversal of 4001231544 is 4451321004.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 166717981 = 4001231544 / (4 + 0 + 0 + 1 + 2 + 3 + 1 + 5 + 4 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83358967 + ... + 83359014.

Almost surely, 2^4001231544 is an apocalyptic number.

It is an amenable number.

4001231544 is an abundant number, since it is smaller than the sum of its proper divisors (6001847376).

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

4001231544 is a wasteful number, since it uses less digits than its factorization.

4001231544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166717990 (or 166717986 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 4001231544 is about 63255.2886642690. The cubic root of 4001231544 is about 1587.5639481050.

Adding to 4001231544 its reverse (4451321004), we get a palindrome (8452552548).

The spelling of 4001231544 in words is "four billion, one million, two hundred thirty-one thousand, five hundred forty-four".