821165098 has 16 divisors (see below), whose sum is σ = 1327979520. Its totient is φ = 378575856.

The previous prime is 821165089. The next prime is 821165117. The reversal of 821165098 is 890561128.

It is a self number, because there is not a number n which added to its sum of digits gives 821165098.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6711 + ... + 41077.

It is an arithmetic number, because the mean of its divisors is an integer number (82998720).

Almost surely, 2^821165098 is an apocalyptic number.

821165098 is a deficient number, since it is larger than the sum of its proper divisors (506814422).

821165098 is a wasteful number, since it uses less digits than its factorization.

821165098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35301.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 821165098 is about 28655.9783989310. The cubic root of 821165098 is about 936.4332534460.

The spelling of 821165098 in words is "eight hundred twenty-one million, one hundred sixty-five thousand, ninety-eight".