86228561 has 2 divisors, whose sum is σ = 86228562. Its totient is φ = 86228560.

The previous prime is 86228551. The next prime is 86228591. The reversal of 86228561 is 16582268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 555025 = 9256^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 86228561 - 2⁶ = 86228497 is a prime.

It is not a weakly prime, because it can be changed into another prime (86228501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43114280 + 43114281.

It is an arithmetic number, because the mean of its divisors is an integer number (43114281).

Almost surely, 2^86228561 is an apocalyptic number.

It is an amenable number.

86228561 is a deficient number, since it is larger than the sum of its proper divisors (1).

86228561 is an equidigital number, since it uses as much as digits as its factorization.

86228561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 86228561 is about 9285.9335018080. The cubic root of 86228561 is about 441.7911849856.

The spelling of 86228561 in words is "eighty-six million, two hundred twenty-eight thousand, five hundred sixty-one".