65451232 has 96 divisors (see below), whose sum is σ = 162860544. Its totient is φ = 25152000.

The previous prime is 65451209. The next prime is 65451233. The reversal of 65451232 is 23215456.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 65451232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65451233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248733 + ... + 248995.

It is an arithmetic number, because the mean of its divisors is an integer number (1696464).

Almost surely, 2^65451232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65451232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81430272).

65451232 is an abundant number, since it is smaller than the sum of its proper divisors (97409312).

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

65451232 is a wasteful number, since it uses less digits than its factorization.

65451232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 384 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 65451232 is about 8090.1935699957. The cubic root of 65451232 is about 403.0008312330. Note that the first 3 decimals are identical.

Adding to 65451232 its reverse (23215456), we get a palindrome (88666688).

It can be divided in two parts, 6545 and 1232, that added together give a palindrome (7777).

The spelling of 65451232 in words is "sixty-five million, four hundred fifty-one thousand, two hundred thirty-two".