227842561 has 2 divisors, whose sum is σ = 227842562. Its totient is φ = 227842560.

The previous prime is 227842543. The next prime is 227842583. The reversal of 227842561 is 165248722.

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., 226201600 + 1640961 = 15040^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 227842561 - 2²³ = 219453953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 227842561.

It is not a weakly prime, because it can be changed into another prime (227842501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113921280 + 113921281.

It is an arithmetic number, because the mean of its divisors is an integer number (113921281).

Almost surely, 2^227842561 is an apocalyptic number.

It is an amenable number.

227842561 is a deficient number, since it is larger than the sum of its proper divisors (1).

227842561 is an equidigital number, since it uses as much as digits as its factorization.

227842561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

The square root of 227842561 is about 15094.4546440075. The cubic root of 227842561 is about 610.7708261270.

The spelling of 227842561 in words is "two hundred twenty-seven million, eight hundred forty-two thousand, five hundred sixty-one".