99152215281 has 24 divisors (see below), whose sum is σ = 163743240960. Its totient is φ = 56636464896.

The previous prime is 99152215277. The next prime is 99152215313. The reversal of 99152215281 is 18251225199.

It is a happy number.

99152215281 is a `hidden beast` number, since 9 + 9 + 152 + 215 + 281 = 666.

It is not a de Polignac number, because 99152215281 - 2² = 99152215277 is a prime.

It is a super-2 number, since 2×99152215281² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99152215271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140121 + ... + 466838.

It is an arithmetic number, because the mean of its divisors is an integer number (6822635040).

Almost surely, 2^99152215281 is an apocalyptic number.

It is an amenable number.

99152215281 is a deficient number, since it is larger than the sum of its proper divisors (64591025679).

99152215281 is a wasteful number, since it uses less digits than its factorization.

99152215281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609565 (or 609562 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The spelling of 99152215281 in words is "ninety-nine billion, one hundred fifty-two million, two hundred fifteen thousand, two hundred eighty-one".