65221080 has 32 divisors (see below), whose sum is σ = 195663600. Its totient is φ = 17392256.

The previous prime is 65221073. The next prime is 65221081. The reversal of 65221080 is 8012256.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 65221080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271635 + ... + 271874.

Almost surely, 2^65221080 is an apocalyptic number.

65221080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65221080 is an abundant number, since it is smaller than the sum of its proper divisors (130442520).

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

65221080 is a wasteful number, since it uses less digits than its factorization.

65221080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543523 (or 543519 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 65221080 is about 8075.9569092461. The cubic root of 65221080 is about 402.5279072249.

The spelling of 65221080 in words is "sixty-five million, two hundred twenty-one thousand, eighty".