252342542561 has 2 divisors, whose sum is σ = 252342542562. Its totient is φ = 252342542560.

The previous prime is 252342542509. The next prime is 252342542579. The reversal of 252342542561 is 165245243252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219525046225 + 32817496336 = 468535^2 + 181156^2 .

It is a cyclic number.

It is not a de Polignac number, because 252342542561 - 2¹⁸ = 252342280417 is a prime.

It is not a weakly prime, because it can be changed into another prime (252342572561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126171271280 + 126171271281.

It is an arithmetic number, because the mean of its divisors is an integer number (126171271281).

Almost surely, 2^252342542561 is an apocalyptic number.

It is an amenable number.

252342542561 is a deficient number, since it is larger than the sum of its proper divisors (1).

252342542561 is an equidigital number, since it uses as much as digits as its factorization.

252342542561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 41.

The spelling of 252342542561 in words is "two hundred fifty-two billion, three hundred forty-two million, five hundred forty-two thousand, five hundred sixty-one".