99543555 has 24 divisors (see below), whose sum is σ = 174732480. Its totient is φ = 52416000.

The previous prime is 99543547. The next prime is 99543571. The reversal of 99543555 is 55534599.

99543555 is a `hidden beast` number, since 9 + 95 + 4 + 3 + 555 = 666.

It is not a de Polignac number, because 99543555 - 2³ = 99543547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 99543555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10446 + ... + 17555.

It is an arithmetic number, because the mean of its divisors is an integer number (7280520).

Almost surely, 2^99543555 is an apocalyptic number.

99543555 is a deficient number, since it is larger than the sum of its proper divisors (75188925).

99543555 is a wasteful number, since it uses less digits than its factorization.

99543555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28091 (or 28088 counting only the distinct ones).

The product of its digits is 607500, while the sum is 45.

The square root of 99543555 is about 9977.1516476397. The cubic root of 99543555 is about 463.4515961365.

The spelling of 99543555 in words is "ninety-nine million, five hundred forty-three thousand, five hundred fifty-five".