99551288 has 8 divisors (see below), whose sum is σ = 186658680. Its totient is φ = 49775640.

The previous prime is 99551281. The next prime is 99551351. The reversal of 99551288 is 88215599.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99551281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221948 + ... + 6221963.

It is an arithmetic number, because the mean of its divisors is an integer number (23332335).

Almost surely, 2^99551288 is an apocalyptic number.

It is an amenable number.

99551288 is a deficient number, since it is larger than the sum of its proper divisors (87107392).

99551288 is a wasteful number, since it uses less digits than its factorization.

99551288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12443917 (or 12443913 counting only the distinct ones).

The product of its digits is 259200, while the sum is 47.

The square root of 99551288 is about 9977.5391755683. The cubic root of 99551288 is about 463.4635968411.

The spelling of 99551288 in words is "ninety-nine million, five hundred fifty-one thousand, two hundred eighty-eight".