2231543531 has 16 divisors (see below), whose sum is σ = 2615094720. Its totient is φ = 1864273920.

The previous prime is 2231543527. The next prime is 2231543537. The reversal of 2231543531 is 1353451322.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2231543531 - 2² = 2231543527 is a prime.

It is a super-3 number, since 3×2231543531³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2231543494 and 2231543503.

It is not an unprimeable number, because it can be changed into a prime (2231543537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346085 + ... + 352473.

It is an arithmetic number, because the mean of its divisors is an integer number (163443420).

Almost surely, 2^2231543531 is an apocalyptic number.

2231543531 is a deficient number, since it is larger than the sum of its proper divisors (383551189).

2231543531 is a wasteful number, since it uses less digits than its factorization.

2231543531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7654.

The product of its digits is 10800, while the sum is 29.

The square root of 2231543531 is about 47239.2160286345. The cubic root of 2231543531 is about 1306.7779196960. Note that the first 3 decimals are identical.

Adding to 2231543531 its reverse (1353451322), we get a palindrome (3584994853).

The spelling of 2231543531 in words is "two billion, two hundred thirty-one million, five hundred forty-three thousand, five hundred thirty-one".