65221236 has 36 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 21708048.

The previous prime is 65221213. The next prime is 65221253. The reversal of 65221236 is 63212256.

65221236 is a `hidden beast` number, since 652 + 2 + 1 + 2 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44605 + ... + 46043.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^65221236 is an apocalyptic number.

It is an amenable number.

65221236 is an abundant number, since it is smaller than the sum of its proper divisors (99889164).

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

65221236 is a wasteful number, since it uses less digits than its factorization.

65221236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708 (or 2703 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 65221236 is about 8075.9665675385. The cubic root of 65221236 is about 402.5282281554.

The spelling of 65221236 in words is "sixty-five million, two hundred twenty-one thousand, two hundred thirty-six".