65221104 has 80 divisors (see below), whose sum is σ = 183099392. Its totient is φ = 19885824.

The previous prime is 65221081. The next prime is 65221133. The reversal of 65221104 is 40112256.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78837 + ... + 79659.

Almost surely, 2^65221104 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 65221104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91549696).

65221104 is an abundant number, since it is smaller than the sum of its proper divisors (117878288).

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

65221104 is a wasteful number, since it uses less digits than its factorization.

65221104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 65221104 is about 8075.9583951380. The cubic root of 65221104 is about 402.5279565989.

It can be divided in two parts, 6522 and 1104, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 65221104 in words is "sixty-five million, two hundred twenty-one thousand, one hundred four".