99851550 has 24 divisors (see below), whose sum is σ = 247632216. Its totient is φ = 26627040.

The previous prime is 99851539. The next prime is 99851551. The reversal of 99851550 is 5515899.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99851551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332689 + ... + 332988.

It is an arithmetic number, because the mean of its divisors is an integer number (10318009).

Almost surely, 2^99851550 is an apocalyptic number.

99851550 is an abundant number, since it is smaller than the sum of its proper divisors (147780666).

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

99851550 is a wasteful number, since it uses less digits than its factorization.

99851550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665692 (or 665687 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 99851550 is about 9992.5747432781. The cubic root of 99851550 is about 463.9290883260.

The spelling of 99851550 in words is "ninety-nine million, eight hundred fifty-one thousand, five hundred fifty".