65461531 has 2 divisors, whose sum is σ = 65461532. Its totient is φ = 65461530.

The previous prime is 65461507. The next prime is 65461597. The reversal of 65461531 is 13516456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65461531 - 2⁵ = 65461499 is a prime.

It is a super-2 number, since 2×65461531² = 8570424081727922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65461493 and 65461502.

It is not a weakly prime, because it can be changed into another prime (65461831) 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 as a sum of consecutive naturals, namely, 32730765 + 32730766.

It is an arithmetic number, because the mean of its divisors is an integer number (32730766).

Almost surely, 2^65461531 is an apocalyptic number.

65461531 is a deficient number, since it is larger than the sum of its proper divisors (1).

65461531 is an equidigital number, since it uses as much as digits as its factorization.

65461531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 65461531 is about 8090.8300563045. The cubic root of 65461531 is about 403.0219680283.

Adding to 65461531 its reverse (13516456), we get a palindrome (78977987).

The spelling of 65461531 in words is "sixty-five million, four hundred sixty-one thousand, five hundred thirty-one".