531440243342 has 8 divisors (see below), whose sum is σ = 797472862032. Its totient is φ = 265615956000.

The previous prime is 531440243249. The next prime is 531440243363. The reversal of 531440243342 is 243342044135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52076459 + ... + 52086662.

It is an arithmetic number, because the mean of its divisors is an integer number (99684107754).

Almost surely, 2^531440243342 is an apocalyptic number.

531440243342 is a deficient number, since it is larger than the sum of its proper divisors (266032618690).

531440243342 is a wasteful number, since it uses less digits than its factorization.

531440243342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104165674.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 531440243342 its reverse (243342044135), we get a palindrome (774782287477).

The spelling of 531440243342 in words is "five hundred thirty-one billion, four hundred forty million, two hundred forty-three thousand, three hundred forty-two".