4000143243 has 4 divisors (see below), whose sum is σ = 5333524328. Its totient is φ = 2666762160.

The previous prime is 4000143227. The next prime is 4000143271. The reversal of 4000143243 is 3423410004.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4000143243 - 2⁴ = 4000143227 is a prime.

It is a super-2 number, since 2×4000143243² = 32002291929037114098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000143643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666690538 + ... + 666690543.

It is an arithmetic number, because the mean of its divisors is an integer number (1333381082).

Almost surely, 2^4000143243 is an apocalyptic number.

4000143243 is a deficient number, since it is larger than the sum of its proper divisors (1333381085).

4000143243 is a wasteful number, since it uses less digits than its factorization.

4000143243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333381084.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4000143243 is about 63246.6856285766. The cubic root of 4000143243 is about 1587.4200004161.

Adding to 4000143243 its reverse (3423410004), we get a palindrome (7423553247).

The spelling of 4000143243 in words is "four billion, one hundred forty-three thousand, two hundred forty-three".