99437221800 has 288 divisors, whose sum is σ = 382450610880. Its totient is φ = 22680806400.

The previous prime is 99437221777. The next prime is 99437221823. The reversal of 99437221800 is 812273499.

It is an interprime number because it is at equal distance from previous prime (99437221777) and next prime (99437221823).

It is a super-2 number, since 2×99437221800² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6178564 + ... + 6194636.

It is an arithmetic number, because the mean of its divisors is an integer number (1327953510).

Almost surely, 2^99437221800 is an apocalyptic number.

99437221800 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99437221800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191225305440).

99437221800 is an abundant number, since it is smaller than the sum of its proper divisors (283013389080).

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

99437221800 is a wasteful number, since it uses less digits than its factorization.

99437221800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16593 (or 16581 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 99437221800 in words is "ninety-nine billion, four hundred thirty-seven million, two hundred twenty-one thousand, eight hundred".