6228724561 has 2 divisors, whose sum is σ = 6228724562. Its totient is φ = 6228724560.

The previous prime is 6228724517. The next prime is 6228724573. The reversal of 6228724561 is 1654278226.

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., 6193690000 + 35034561 = 78700^2 + 5919^2 .

It is a cyclic number.

It is not a de Polignac number, because 6228724561 - 2¹⁹ = 6228200273 is a prime.

It is not a weakly prime, because it can be changed into another prime (6228724361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3114362280 + 3114362281.

It is an arithmetic number, because the mean of its divisors is an integer number (3114362281).

Almost surely, 2^6228724561 is an apocalyptic number.

It is an amenable number.

6228724561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6228724561 is an equidigital number, since it uses as much as digits as its factorization.

6228724561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 43.

The square root of 6228724561 is about 78922.2691070144. The cubic root of 6228724561 is about 1839.9232561919.

The spelling of 6228724561 in words is "six billion, two hundred twenty-eight million, seven hundred twenty-four thousand, five hundred sixty-one".