285142229 has 2 divisors, whose sum is σ = 285142230. Its totient is φ = 285142228.

The previous prime is 285142223. The next prime is 285142259. The reversal of 285142229 is 922241582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249166225 + 35976004 = 15785^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 285142229 - 2⁸ = 285141973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285142223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142571114 + 142571115.

It is an arithmetic number, because the mean of its divisors is an integer number (142571115).

Almost surely, 2^285142229 is an apocalyptic number.

It is an amenable number.

285142229 is a deficient number, since it is larger than the sum of its proper divisors (1).

285142229 is an equidigital number, since it uses as much as digits as its factorization.

285142229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 285142229 is about 16886.1549501359. The cubic root of 285142229 is about 658.1938904721.

The spelling of 285142229 in words is "two hundred eighty-five million, one hundred forty-two thousand, two hundred twenty-nine".