283213121 has 2 divisors, whose sum is σ = 283213122. Its totient is φ = 283213120.

The previous prime is 283213103. The next prime is 283213123. The reversal of 283213121 is 121312382.

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., 283080625 + 132496 = 16825^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 283213121 - 2²⁶ = 216104257 is a prime.

Together with 283213123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (283213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141606560 + 141606561.

It is an arithmetic number, because the mean of its divisors is an integer number (141606561).

Almost surely, 2^283213121 is an apocalyptic number.

It is an amenable number.

283213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

283213121 is an equidigital number, since it uses as much as digits as its factorization.

283213121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 283213121 is about 16828.9370133707. The cubic root of 283213121 is about 656.7062102956.

The spelling of 283213121 in words is "two hundred eighty-three million, two hundred thirteen thousand, one hundred twenty-one".