99553172 has 12 divisors (see below), whose sum is σ = 180225780. Its totient is φ = 48060096.

The previous prime is 99553171. The next prime is 99553187. The reversal of 99553172 is 27135599.

It can be written as a sum of positive squares in 2 ways, for example, as 26894596 + 72658576 = 5186^2 + 8524^2 .

It is a super-3 number, since 3×99553172³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99553171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428993 + ... + 429224.

It is an arithmetic number, because the mean of its divisors is an integer number (15018815).

Almost surely, 2^99553172 is an apocalyptic number.

It is an amenable number.

99553172 is a deficient number, since it is larger than the sum of its proper divisors (80672608).

99553172 is a wasteful number, since it uses less digits than its factorization.

99553172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858250 (or 858248 counting only the distinct ones).

The product of its digits is 85050, while the sum is 41.

The square root of 99553172 is about 9977.6335871789. The cubic root of 99553172 is about 463.4665204929.

The spelling of 99553172 in words is "ninety-nine million, five hundred fifty-three thousand, one hundred seventy-two".