65221436 has 12 divisors (see below), whose sum is σ = 130442928. Its totient is φ = 27952032.

The previous prime is 65221423. The next prime is 65221439. The reversal of 65221436 is 63412256.

65221436 is an admirable number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 65221399 and 65221408.

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, 1164641 + ... + 1164696.

It is an arithmetic number, because the mean of its divisors is an integer number (10870244).

Almost surely, 2^65221436 is an apocalyptic number.

It is an amenable number.

65221436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65221436 is a wasteful number, since it uses less digits than its factorization.

65221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329348 (or 2329346 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 65221436 is about 8075.9789499478. The cubic root of 65221436 is about 402.5286396040.

The spelling of 65221436 in words is "sixty-five million, two hundred twenty-one thousand, four hundred thirty-six".