65511442 has 4 divisors (see below), whose sum is σ = 98267166. Its totient is φ = 32755720.

The previous prime is 65511437. The next prime is 65511443. The reversal of 65511442 is 24411556.

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

It can be written as a sum of positive squares in only one way, i.e., 62583921 + 2927521 = 7911^2 + 1711^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65511442.

It is not an unprimeable number, because it can be changed into a prime (65511443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16377859 + ... + 16377862.

Almost surely, 2^65511442 is an apocalyptic number.

65511442 is a deficient number, since it is larger than the sum of its proper divisors (32755724).

65511442 is a wasteful number, since it uses less digits than its factorization.

65511442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32755723.

The product of its digits is 4800, while the sum is 28.

The square root of 65511442 is about 8093.9138863717. The cubic root of 65511442 is about 403.1243697444.

Adding to 65511442 its reverse (24411556), we get a palindrome (89922998).

The spelling of 65511442 in words is "sixty-five million, five hundred eleven thousand, four hundred forty-two".