65221160 has 32 divisors (see below), whose sum is σ = 150330600. Its totient is φ = 25451520.

The previous prime is 65221157. The next prime is 65221171. The reversal of 65221160 is 6112256.

It can be written as a sum of positive squares in 4 ways, for example, as 22108804 + 43112356 = 4702^2 + 6566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18245 + ... + 21524.

Almost surely, 2^65221160 is an apocalyptic number.

It is an amenable number.

65221160 is an abundant number, since it is smaller than the sum of its proper divisors (85109440).

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

65221160 is a wasteful number, since it uses less digits than its factorization.

65221160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39821 (or 39817 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 65221160 is about 8075.9618622180. The cubic root of 65221160 is about 402.5280718047.

It can be divided in two parts, 652 and 21160, that added together give a palindrome (21812).

The spelling of 65221160 in words is "sixty-five million, two hundred twenty-one thousand, one hundred sixty".