531400232443 has 4 divisors (see below), whose sum is σ = 531681547320. Its totient is φ = 531118917568.

The previous prime is 531400232401. The next prime is 531400232471. The reversal of 531400232443 is 344232004135.

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-531400232443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531400232843) 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, 140654605 + ... + 140658382.

It is an arithmetic number, because the mean of its divisors is an integer number (132920386830).

Almost surely, 2^531400232443 is an apocalyptic number.

531400232443 is a deficient number, since it is larger than the sum of its proper divisors (281314877).

531400232443 is a wasteful number, since it uses less digits than its factorization.

531400232443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281314876.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 531400232443 its reverse (344232004135), we get a palindrome (875632236578).

The spelling of 531400232443 in words is "five hundred thirty-one billion, four hundred million, two hundred thirty-two thousand, four hundred forty-three".