60516221 has 2 divisors, whose sum is σ = 60516222. Its totient is φ = 60516220.

The previous prime is 60516191. The next prime is 60516223. The reversal of 60516221 is 12261506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59892121 + 624100 = 7739^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 60516221 - 2¹⁰ = 60515197 is a prime.

Together with 60516223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60516223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30258110 + 30258111.

It is an arithmetic number, because the mean of its divisors is an integer number (30258111).

Almost surely, 2^60516221 is an apocalyptic number.

It is an amenable number.

60516221 is a deficient number, since it is larger than the sum of its proper divisors (1).

60516221 is an equidigital number, since it uses as much as digits as its factorization.

60516221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 60516221 is about 7779.2172485411. The cubic root of 60516221 is about 392.6063022280.

Adding to 60516221 its reverse (12261506), we get a palindrome (72777727).

The spelling of 60516221 in words is "sixty million, five hundred sixteen thousand, two hundred twenty-one".