140322566521 has 2 divisors, whose sum is σ = 140322566522. Its totient is φ = 140322566520.

The previous prime is 140322566443. The next prime is 140322566537. The reversal of 140322566521 is 125665223041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71395840000 + 68926726521 = 267200^2 + 262539^2 .

It is an emirp because it is prime and its reverse (125665223041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140322566521 - 2¹⁹ = 140322042233 is a prime.

It is not a weakly prime, because it can be changed into another prime (140322566561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70161283260 + 70161283261.

It is an arithmetic number, because the mean of its divisors is an integer number (70161283261).

Almost surely, 2^140322566521 is an apocalyptic number.

It is an amenable number.

140322566521 is a deficient number, since it is larger than the sum of its proper divisors (1).

140322566521 is an equidigital number, since it uses as much as digits as its factorization.

140322566521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 140322566521 its reverse (125665223041), we get a palindrome (265987789562).

The spelling of 140322566521 in words is "one hundred forty billion, three hundred twenty-two million, five hundred sixty-six thousand, five hundred twenty-one".