60815281 has 2 divisors, whose sum is σ = 60815282. Its totient is φ = 60815280.

The previous prime is 60815207. The next prime is 60815299. The reversal of 60815281 is 18251806.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 115600 = 7791^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 60815281 - 2¹⁷ = 60684209 is a prime.

It is a super-2 number, since 2×60815281² = 7396996806217922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (60815081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30407640 + 30407641.

It is an arithmetic number, because the mean of its divisors is an integer number (30407641).

Almost surely, 2^60815281 is an apocalyptic number.

It is an amenable number.

60815281 is a deficient number, since it is larger than the sum of its proper divisors (1).

60815281 is an equidigital number, since it uses as much as digits as its factorization.

60815281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 60815281 is about 7798.4152877363. The cubic root of 60815281 is about 393.2519691098.

The spelling of 60815281 in words is "sixty million, eight hundred fifteen thousand, two hundred eighty-one".