60278221 has 2 divisors, whose sum is σ = 60278222. Its totient is φ = 60278220.

The previous prime is 60278213. The next prime is 60278227. The reversal of 60278221 is 12287206.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 9084196 = 7155^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 60278221 - 2³ = 60278213 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60278221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60278227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30139110 + 30139111.

It is an arithmetic number, because the mean of its divisors is an integer number (30139111).

Almost surely, 2^60278221 is an apocalyptic number.

It is an amenable number.

60278221 is a deficient number, since it is larger than the sum of its proper divisors (1).

60278221 is an equidigital number, since it uses as much as digits as its factorization.

60278221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 60278221 is about 7763.9050097229. The cubic root of 60278221 is about 392.0909414335.

The spelling of 60278221 in words is "sixty million, two hundred seventy-eight thousand, two hundred twenty-one".