99990255 has 16 divisors (see below), whose sum is σ = 168405120. Its totient is φ = 50521248.

The previous prime is 99990239. The next prime is 99990263. The reversal of 99990255 is 55209999.

It is not a de Polignac number, because 99990255 - 2⁴ = 99990239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175137 + ... + 175706.

It is an arithmetic number, because the mean of its divisors is an integer number (10525320).

Almost surely, 2^99990255 is an apocalyptic number.

99990255 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99990255 is a deficient number, since it is larger than the sum of its proper divisors (68414865).

99990255 is a wasteful number, since it uses less digits than its factorization.

99990255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350870.

The product of its (nonzero) digits is 328050, while the sum is 48.

The square root of 99990255 is about 9999.5127381288. The cubic root of 99990255 is about 464.1438054438.

The spelling of 99990255 in words is "ninety-nine million, nine hundred ninety thousand, two hundred fifty-five".