99888231 has 8 divisors (see below), whose sum is σ = 137480704. Its totient is φ = 64443960.

The previous prime is 99888227. The next prime is 99888233. The reversal of 99888231 is 13288899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99888231 - 2² = 99888227 is a prime.

It is a super-2 number, since 2×99888231² = 19955317384618722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99888233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536941 + ... + 537126.

It is an arithmetic number, because the mean of its divisors is an integer number (17185088).

Almost surely, 2^99888231 is an apocalyptic number.

99888231 is a deficient number, since it is larger than the sum of its proper divisors (37592473).

99888231 is a wasteful number, since it uses less digits than its factorization.

99888231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074101.

The product of its digits is 248832, while the sum is 48.

The square root of 99888231 is about 9994.4099875881. The cubic root of 99888231 is about 463.9858903136.

It can be divided in two parts, 9988 and 8231, that multiplied together give a palindrome (82211228).

The spelling of 99888231 in words is "ninety-nine million, eight hundred eighty-eight thousand, two hundred thirty-one".