99995550 has 24 divisors (see below), whose sum is σ = 247989336. Its totient is φ = 26665440.

The previous prime is 99995549. The next prime is 99995551. The reversal of 99995550 is 5559999.

It is an interprime number because it is at equal distance from previous prime (99995549) and next prime (99995551).

It is a super-2 number, since 2×99995550² = 19998220039605000, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99995493 and 99995502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99995551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333169 + ... + 333468.

It is an arithmetic number, because the mean of its divisors is an integer number (10332889).

Almost surely, 2^99995550 is an apocalyptic number.

99995550 is an abundant number, since it is smaller than the sum of its proper divisors (147993786).

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

99995550 is a wasteful number, since it uses less digits than its factorization.

99995550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666652 (or 666647 counting only the distinct ones).

The product of its (nonzero) digits is 820125, while the sum is 51.

The square root of 99995550 is about 9999.7774975246. Note that the first 3 decimals coincide. The cubic root of 99995550 is about 464.1519982357.

The spelling of 99995550 in words is "ninety-nine million, nine hundred ninety-five thousand, five hundred fifty".