252405002321 has 2 divisors, whose sum is σ = 252405002322. Its totient is φ = 252405002320.

The previous prime is 252405002299. The next prime is 252405002327. The reversal of 252405002321 is 123200504252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136113772096 + 116291230225 = 368936^2 + 341015^2 .

It is a cyclic number.

It is not a de Polignac number, because 252405002321 - 2²² = 252400808017 is a prime.

It is not a weakly prime, because it can be changed into another prime (252405002327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126202501160 + 126202501161.

It is an arithmetic number, because the mean of its divisors is an integer number (126202501161).

Almost surely, 2^252405002321 is an apocalyptic number.

It is an amenable number.

252405002321 is a deficient number, since it is larger than the sum of its proper divisors (1).

252405002321 is an equidigital number, since it uses as much as digits as its factorization.

252405002321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 252405002321 its reverse (123200504252), we get a palindrome (375605506573).

The spelling of 252405002321 in words is "two hundred fifty-two billion, four hundred five million, two thousand, three hundred twenty-one".