99651272 has 32 divisors (see below), whose sum is σ = 222825600. Its totient is φ = 40850304.

The previous prime is 99651271. The next prime is 99651283. The reversal of 99651272 is 27215699.

It is a super-2 number, since 2×99651272² = 19860752022435968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99651271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37397 + ... + 39972.

It is an arithmetic number, because the mean of its divisors is an integer number (6963300).

Almost surely, 2^99651272 is an apocalyptic number.

99651272 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99651272 is an abundant number, since it is smaller than the sum of its proper divisors (123174328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99651272 is a wasteful number, since it uses less digits than its factorization.

99651272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77405 (or 77401 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 99651272 is about 9982.5483720341. The cubic root of 99651272 is about 463.6187042917.

The spelling of 99651272 in words is "ninety-nine million, six hundred fifty-one thousand, two hundred seventy-two".