99521298357 has 32 divisors (see below), whose sum is σ = 154827243648. Its totient is φ = 56300783616.

The previous prime is 99521298347. The next prime is 99521298367. The reversal of 99521298357 is 75389212599.

It is an interprime number because it is at equal distance from previous prime (99521298347) and next prime (99521298367).

It is not a de Polignac number, because 99521298357 - 2⁴ = 99521298341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99521298357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99521298347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1716928 + ... + 1773945.

It is an arithmetic number, because the mean of its divisors is an integer number (4838351364).

Almost surely, 2^99521298357 is an apocalyptic number.

It is an amenable number.

99521298357 is a deficient number, since it is larger than the sum of its proper divisors (55305945291).

99521298357 is a wasteful number, since it uses less digits than its factorization.

99521298357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490949.

The product of its digits is 12247200, while the sum is 60.

The spelling of 99521298357 in words is "ninety-nine billion, five hundred twenty-one million, two hundred ninety-eight thousand, three hundred fifty-seven".