99543220 has 24 divisors (see below), whose sum is σ = 238904064. Its totient is φ = 34129056.

The previous prime is 99543187. The next prime is 99543221. The reversal of 99543220 is 2234599.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99543221) 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, 355372 + ... + 355651.

It is an arithmetic number, because the mean of its divisors is an integer number (9954336).

Almost surely, 2^99543220 is an apocalyptic number.

It is an amenable number.

99543220 is an abundant number, since it is smaller than the sum of its proper divisors (139360844).

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

99543220 is a wasteful number, since it uses less digits than its factorization.

99543220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711039 (or 711037 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 99543220 is about 9977.1348592670. The cubic root of 99543220 is about 463.4510762419.

The spelling of 99543220 in words is "ninety-nine million, five hundred forty-three thousand, two hundred twenty".