65394531 has 24 divisors (see below), whose sum is σ = 99600384. Its totient is φ = 41284080.

The previous prime is 65394521. The next prime is 65394533. The reversal of 65394531 is 13549356.

It is not a de Polignac number, because 65394531 - 2⁵ = 65394499 is a prime.

It is a super-2 number, since 2×65394531² = 8552889369419922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65394533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10620 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (4150016).

Almost surely, 2^65394531 is an apocalyptic number.

65394531 is a deficient number, since it is larger than the sum of its proper divisors (34205853).

65394531 is a wasteful number, since it uses less digits than its factorization.

65394531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071 (or 5068 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 65394531 is about 8086.6885064283. The cubic root of 65394531 is about 402.8844231779.

The spelling of 65394531 in words is "sixty-five million, three hundred ninety-four thousand, five hundred thirty-one".