99385551 has 12 divisors (see below), whose sum is σ = 143652600. Its totient is φ = 66212880.

The previous prime is 99385537. The next prime is 99385577. The reversal of 99385551 is 15558399.

99385551 is a `hidden beast` number, since 9 + 93 + 8 + 5 + 551 = 666.

It is not a de Polignac number, because 99385551 - 2²³ = 90996943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99385497 and 99385506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99385591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16261 + ... + 21521.

It is an arithmetic number, because the mean of its divisors is an integer number (11971050).

Almost surely, 2^99385551 is an apocalyptic number.

99385551 is a deficient number, since it is larger than the sum of its proper divisors (44267049).

99385551 is a wasteful number, since it uses less digits than its factorization.

99385551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7366 (or 7363 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 99385551 is about 9969.2302110043. The cubic root of 99385551 is about 463.2062563474.

The spelling of 99385551 in words is "ninety-nine million, three hundred eighty-five thousand, five hundred fifty-one".