99995220 has 144 divisors (see below), whose sum is σ = 329976192. Its totient is φ = 24364800.

The previous prime is 99995213. The next prime is 99995227. The reversal of 99995220 is 2259999.

It is an interprime number because it is at equal distance from previous prime (99995213) and next prime (99995227).

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

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99995227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 353199 + ... + 353481.

Almost surely, 2^99995220 is an apocalyptic number.

99995220 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 99995220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164988096).

99995220 is an abundant number, since it is smaller than the sum of its proper divisors (229980972).

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

99995220 is a wasteful number, since it uses less digits than its factorization.

99995220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 99995220 is about 9999.7609971439. The cubic root of 99995220 is about 464.1514876452.

The spelling of 99995220 in words is "ninety-nine million, nine hundred ninety-five thousand, two hundred twenty".