65221432 has 16 divisors (see below), whose sum is σ = 124363800. Its totient is φ = 32057760.

The previous prime is 65221423. The next prime is 65221439. The reversal of 65221432 is 23412256.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 65221397 and 65221406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221439) 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, 68619 + ... + 69562.

Almost surely, 2^65221432 is an apocalyptic number.

It is an amenable number.

65221432 is a deficient number, since it is larger than the sum of its proper divisors (59142368).

65221432 is a wasteful number, since it uses less digits than its factorization.

65221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138246 (or 138242 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 65221432 is about 8075.9787022998. The cubic root of 65221432 is about 402.5286313751.

Adding to 65221432 its reverse (23412256), we get a palindrome (88633688).

The spelling of 65221432 in words is "sixty-five million, two hundred twenty-one thousand, four hundred thirty-two".