65540531 has 8 divisors (see below), whose sum is σ = 75337824. Its totient is φ = 55851840.

The previous prime is 65540483. The next prime is 65540543. The reversal of 65540531 is 13504556.

65540531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65540531 - 2¹⁸ = 65278387 is a prime.

It is a super-2 number, since 2×65540531² = 8591122407523922, 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 = 65540494 and 65540503.

It is not an unprimeable number, because it can be changed into a prime (65540561) 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 7 ways as a sum of consecutive naturals, for example, 25850 + ... + 28271.

It is an arithmetic number, because the mean of its divisors is an integer number (9417228).

Almost surely, 2^65540531 is an apocalyptic number.

65540531 is a deficient number, since it is larger than the sum of its proper divisors (9797293).

65540531 is a wasteful number, since it uses less digits than its factorization.

65540531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54301.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 65540531 is about 8095.7106544145. The cubic root of 65540531 is about 403.1840272598.

The spelling of 65540531 in words is "sixty-five million, five hundred forty thousand, five hundred thirty-one".