65342581 has 2 divisors, whose sum is σ = 65342582. Its totient is φ = 65342580.

The previous prime is 65342551. The next prime is 65342593. The reversal of 65342581 is 18524356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 4268356 = 7815^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 65342581 - 2¹³ = 65334389 is a prime.

It is a super-2 number, since 2×65342581² = 8539305783483122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65342531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32671290 + 32671291.

It is an arithmetic number, because the mean of its divisors is an integer number (32671291).

Almost surely, 2^65342581 is an apocalyptic number.

It is an amenable number.

65342581 is a deficient number, since it is larger than the sum of its proper divisors (1).

65342581 is an equidigital number, since it uses as much as digits as its factorization.

65342581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 65342581 is about 8083.4757994318. The cubic root of 65342581 is about 402.7777099192. Note that the first 4 decimals are identical.

It can be divided in two parts, 653 and 42581, that added together give a palindrome (43234).

The spelling of 65342581 in words is "sixty-five million, three hundred forty-two thousand, five hundred eighty-one".