99998222 has 4 divisors (see below), whose sum is σ = 149997336. Its totient is φ = 49999110.

The previous prime is 99998207. The next prime is 99998231. The reversal of 99998222 is 22289999.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×99998222² = 19999288806322568, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999554 + ... + 24999557.

It is an arithmetic number, because the mean of its divisors is an integer number (37499334).

Almost surely, 2^99998222 is an apocalyptic number.

99998222 is a deficient number, since it is larger than the sum of its proper divisors (49999114).

99998222 is a wasteful number, since it uses less digits than its factorization.

99998222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49999113.

The product of its digits is 419904, while the sum is 50.

The square root of 99998222 is about 9999.9110996048. The cubic root of 99998222 is about 464.1561324300.

The spelling of 99998222 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred twenty-two".