321143142450542 has 16 divisors (see below), whose sum is σ = 526504127283072. Its totient is φ = 146251146466560.

The previous prime is 321143142450541. The next prime is 321143142450623. The reversal of 321143142450542 is 245054241341123.

It is a super-2 number, since 2×321143142450542² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321143142450542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321143142450541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152344943183 + ... + 152344945290.

It is an arithmetic number, because the mean of its divisors is an integer number (32906507955192).

Almost surely, 2^{321143142450542} is an apocalyptic number.

321143142450542 is a deficient number, since it is larger than the sum of its proper divisors (205360984832530).

321143142450542 is a wasteful number, since it uses less digits than its factorization.

321143142450542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304689888523.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 321143142450542 its reverse (245054241341123), we get a palindrome (566197383791665).

The spelling of 321143142450542 in words is "three hundred twenty-one trillion, one hundred forty-three billion, one hundred forty-two million, four hundred fifty thousand, five hundred forty-two".