4020531343 has 4 divisors (see below), whose sum is σ = 4022842408. Its totient is φ = 4018220280.

The previous prime is 4020531337. The next prime is 4020531367. The reversal of 4020531343 is 3431350204.

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

It is a cyclic number.

It is not a de Polignac number, because 4020531343 - 2¹³ = 4020523151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020531443) 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, 1152921 + ... + 1156402.

It is an arithmetic number, because the mean of its divisors is an integer number (1005710602).

Almost surely, 2^4020531343 is an apocalyptic number.

4020531343 is a deficient number, since it is larger than the sum of its proper divisors (2311065).

4020531343 is a wasteful number, since it uses less digits than its factorization.

4020531343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311064.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 4020531343 is about 63407.6599710161. The cubic root of 4020531343 is about 1590.1123746111.

Adding to 4020531343 its reverse (3431350204), we get a palindrome (7451881547).

The spelling of 4020531343 in words is "four billion, twenty million, five hundred thirty-one thousand, three hundred forty-three".