99321600 has 216 divisors, whose sum is σ = 375114880. Its totient is φ = 22671360.

The previous prime is 99321587. The next prime is 99321601. The reversal of 99321600 is 612399.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99321601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134031 + ... + 134769.

Almost surely, 2^99321600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99321600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187557440).

99321600 is an abundant number, since it is smaller than the sum of its proper divisors (275793280).

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

99321600 is a wasteful number, since it uses less digits than its factorization.

99321600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 99321600 is about 9966.0222757126. The cubic root of 99321600 is about 463.1068828840.

Adding to 99321600 its reverse (612399), we get a palindrome (99933999).

The spelling of 99321600 in words is "ninety-nine million, three hundred twenty-one thousand, six hundred".