65061531 has 6 divisors (see below), whose sum is σ = 93977780. Its totient is φ = 43374348.

The previous prime is 65061527. The next prime is 65061553. The reversal of 65061531 is 13516056.

It is a happy number.

65061531 is a `hidden beast` number, since 6 + 506 + 153 + 1 = 666.

65061531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65061531 - 2² = 65061527 is a prime.

It is a super-2 number, since 2×65061531² = 8466005632127922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65061495 and 65061504.

It is not an unprimeable number, because it can be changed into a prime (65061571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3614521 + ... + 3614538.

Almost surely, 2^65061531 is an apocalyptic number.

65061531 is a deficient number, since it is larger than the sum of its proper divisors (28916249).

65061531 is a wasteful number, since it uses less digits than its factorization.

65061531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7229065 (or 7229062 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 65061531 is about 8066.0728362692. The cubic root of 65061531 is about 402.1994072704.

Adding to 65061531 its reverse (13516056), we get a palindrome (78577587).

The spelling of 65061531 in words is "sixty-five million, sixty-one thousand, five hundred thirty-one".