163212251 has 2 divisors, whose sum is σ = 163212252. Its totient is φ = 163212250.

The previous prime is 163212239. The next prime is 163212289. The reversal of 163212251 is 152212361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163212251 - 2¹⁸ = 162950107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163212151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81606125 + 81606126.

It is an arithmetic number, because the mean of its divisors is an integer number (81606126).

Almost surely, 2^163212251 is an apocalyptic number.

163212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

163212251 is an equidigital number, since it uses as much as digits as its factorization.

163212251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 163212251 is about 12775.4550212507. The cubic root of 163212251 is about 546.4925571267.

The spelling of 163212251 in words is "one hundred sixty-three million, two hundred twelve thousand, two hundred fifty-one".