4221543131 has 4 divisors (see below), whose sum is σ = 4546277232. Its totient is φ = 3896809032.

The previous prime is 4221543097. The next prime is 4221543133. The reversal of 4221543131 is 1313451224.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221543131 is a prime.

It is a super-2 number, since 2×4221543131² = 35642852813786566322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221543131.

It is not an unprimeable number, because it can be changed into a prime (4221543133) 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, 162367031 + ... + 162367056.

It is an arithmetic number, because the mean of its divisors is an integer number (1136569308).

Almost surely, 2^4221543131 is an apocalyptic number.

4221543131 is a deficient number, since it is larger than the sum of its proper divisors (324734101).

4221543131 is a wasteful number, since it uses less digits than its factorization.

4221543131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324734100.

The product of its digits is 2880, while the sum is 26.

The square root of 4221543131 is about 64973.4032585642. The cubic root of 4221543131 is about 1616.1825384584.

Adding to 4221543131 its reverse (1313451224), we get a palindrome (5534994355).

The spelling of 4221543131 in words is "four billion, two hundred twenty-one million, five hundred forty-three thousand, one hundred thirty-one".