65543442 has 16 divisors (see below), whose sum is σ = 131468832. Its totient is φ = 21784160.

The previous prime is 65543431. The next prime is 65543447. The reversal of 65543442 is 24434556.

It is not an unprimeable number, because it can be changed into a prime (65543447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13659 + ... + 17822.

It is an arithmetic number, because the mean of its divisors is an integer number (8216802).

Almost surely, 2^65543442 is an apocalyptic number.

65543442 is an abundant number, since it is smaller than the sum of its proper divisors (65925390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65543442 is a wasteful number, since it uses less digits than its factorization.

65543442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31833.

The product of its digits is 57600, while the sum is 33.

The square root of 65543442 is about 8095.8904389820. The cubic root of 65543442 is about 403.1899963465.

Adding to 65543442 its reverse (24434556), we get a palindrome (89977998).

The spelling of 65543442 in words is "sixty-five million, five hundred forty-three thousand, four hundred forty-two".