252231641 has 2 divisors, whose sum is σ = 252231642. Its totient is φ = 252231640.

The previous prime is 252231613. The next prime is 252231649. The reversal of 252231641 is 146132252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225150025 + 27081616 = 15005^2 + 5204^2 .

It is a cyclic number.

It is not a de Polignac number, because 252231641 - 2²² = 248037337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252231641.

It is not a weakly prime, because it can be changed into another prime (252231649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126115820 + 126115821.

It is an arithmetic number, because the mean of its divisors is an integer number (126115821).

Almost surely, 2^252231641 is an apocalyptic number.

It is an amenable number.

252231641 is a deficient number, since it is larger than the sum of its proper divisors (1).

252231641 is an equidigital number, since it uses as much as digits as its factorization.

252231641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 252231641 is about 15881.8021962245. The cubic root of 252231641 is about 631.8294359263.

Adding to 252231641 its reverse (146132252), we get a palindrome (398363893).

The spelling of 252231641 in words is "two hundred fifty-two million, two hundred thirty-one thousand, six hundred forty-one".