252335356621 has 2 divisors, whose sum is σ = 252335356622. Its totient is φ = 252335356620.

The previous prime is 252335356591. The next prime is 252335356711. The reversal of 252335356621 is 126653533252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233781920100 + 18553436521 = 483510^2 + 136211^2 .

It is a cyclic number.

It is not a de Polignac number, because 252335356621 - 2⁹ = 252335356109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252335351621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126167678310 + 126167678311.

It is an arithmetic number, because the mean of its divisors is an integer number (126167678311).

Almost surely, 2^252335356621 is an apocalyptic number.

It is an amenable number.

252335356621 is a deficient number, since it is larger than the sum of its proper divisors (1).

252335356621 is an equidigital number, since it uses as much as digits as its factorization.

252335356621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 43.

Adding to 252335356621 its reverse (126653533252), we get a palindrome (378988889873).

The spelling of 252335356621 in words is "two hundred fifty-two billion, three hundred thirty-five million, three hundred fifty-six thousand, six hundred twenty-one".