652221331442 has 18 divisors (see below), whose sum is σ = 995297775183. Its totient is φ = 320550244764.

The previous prime is 652221331409. The next prime is 652221331477. The reversal of 652221331442 is 244133122256.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 326110665721 + 326110665721 = 571061^2 + 571061^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=571061.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 67380359 + ... + 67390037.

Almost surely, 2^652221331442 is an apocalyptic number.

652221331442 is a deficient number, since it is larger than the sum of its proper divisors (343076443741).

652221331442 is an frugal number, since it uses more digits than its factorization.

652221331442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19478 (or 9740 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

Adding to 652221331442 its reverse (244133122256), we get a palindrome (896354453698).

The spelling of 652221331442 in words is "six hundred fifty-two billion, two hundred twenty-one million, three hundred thirty-one thousand, four hundred forty-two".