65020181 has 2 divisors, whose sum is σ = 65020182. Its totient is φ = 65020180.

The previous prime is 65020177. The next prime is 65020201. The reversal of 65020181 is 18102056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 6421156 = 7655^2 + 2534^2 .

It is a cyclic number.

It is not a de Polignac number, because 65020181 - 2² = 65020177 is a prime.

It is a super-2 number, since 2×65020181² = 8455247874545522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65020141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510090 + 32510091.

It is an arithmetic number, because the mean of its divisors is an integer number (32510091).

Almost surely, 2^65020181 is an apocalyptic number.

It is an amenable number.

65020181 is a deficient number, since it is larger than the sum of its proper divisors (1).

65020181 is an equidigital number, since it uses as much as digits as its factorization.

65020181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 65020181 is about 8063.5092236569. The cubic root of 65020181 is about 402.1141829719.

The spelling of 65020181 in words is "sixty-five million, twenty thousand, one hundred eighty-one".