99965220 has 48 divisors (see below), whose sum is σ = 280687680. Its totient is φ = 26582656.

The previous prime is 99965209. The next prime is 99965221. The reversal of 99965220 is 2256999.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99965221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21199 + ... + 25481.

It is an arithmetic number, because the mean of its divisors is an integer number (5847660).

Almost surely, 2^99965220 is an apocalyptic number.

It is an amenable number.

99965220 is an abundant number, since it is smaller than the sum of its proper divisors (180722460).

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

99965220 is a wasteful number, since it uses less digits than its factorization.

99965220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684 (or 4682 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 99965220 is about 9998.2608487676. The cubic root of 99965220 is about 464.1050656350.

The spelling of 99965220 in words is "ninety-nine million, nine hundred sixty-five thousand, two hundred twenty".