65512541 has 4 divisors (see below), whose sum is σ = 66092412. Its totient is φ = 64932672.

The previous prime is 65512493. The next prime is 65512553. The reversal of 65512541 is 14521556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 62884900 = 1621^2 + 7930^2 .

It is a cyclic number.

It is not a de Polignac number, because 65512541 - 2⁶ = 65512477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65512561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289766 + ... + 289991.

It is an arithmetic number, because the mean of its divisors is an integer number (16523103).

Almost surely, 2^65512541 is an apocalyptic number.

It is an amenable number.

65512541 is a deficient number, since it is larger than the sum of its proper divisors (579871).

65512541 is a wasteful number, since it uses less digits than its factorization.

65512541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579870.

The product of its digits is 6000, while the sum is 29.

The square root of 65512541 is about 8093.9817766041. The cubic root of 65512541 is about 403.1266239624.

The spelling of 65512541 in words is "sixty-five million, five hundred twelve thousand, five hundred forty-one".