501532221344 has 72 divisors (see below), whose sum is σ = 1253016420768. Its totient is φ = 195402157440.

The previous prime is 501532221299. The next prime is 501532221347. The reversal of 501532221344 is 443122235105.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 501532221344.

It is not an unprimeable number, because it can be changed into a prime (501532221347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14521604 + ... + 14556099.

It is an arithmetic number, because the mean of its divisors is an integer number (17403005844).

Almost surely, 2^501532221344 is an apocalyptic number.

It is an amenable number.

501532221344 is an abundant number, since it is smaller than the sum of its proper divisors (751484199424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

501532221344 is a wasteful number, since it uses less digits than its factorization.

501532221344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29077738 (or 29077723 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 501532221344 its reverse (443122235105), we get a palindrome (944654456449).

The spelling of 501532221344 in words is "five hundred one billion, five hundred thirty-two million, two hundred twenty-one thousand, three hundred forty-four".