286221829 has 2 divisors, whose sum is σ = 286221830. Its totient is φ = 286221828.

The previous prime is 286221811. The next prime is 286221841. The reversal of 286221829 is 928122682.

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., 197824225 + 88397604 = 14065^2 + 9402^2 .

It is a cyclic number.

It is not a de Polignac number, because 286221829 - 2⁵ = 286221797 is a prime.

It is a super-2 number, since 2×286221829² = 163845870792210482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 286221791 and 286221800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (286227829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143110914 + 143110915.

It is an arithmetic number, because the mean of its divisors is an integer number (143110915).

Almost surely, 2^286221829 is an apocalyptic number.

It is an amenable number.

286221829 is a deficient number, since it is larger than the sum of its proper divisors (1).

286221829 is an equidigital number, since it uses as much as digits as its factorization.

286221829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 286221829 is about 16918.0917659173. The cubic root of 286221829 is about 659.0235246349.

The spelling of 286221829 in words is "two hundred eighty-six million, two hundred twenty-one thousand, eight hundred twenty-nine".