99551238 has 32 divisors (see below), whose sum is σ = 205117920. Its totient is φ = 32186880.

The previous prime is 99551237. The next prime is 99551273. The reversal of 99551238 is 83215599.

It is a self number, because there is not a number n which added to its sum of digits gives 99551238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99551237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112558 + ... + 113438.

It is an arithmetic number, because the mean of its divisors is an integer number (6409935).

Almost surely, 2^99551238 is an apocalyptic number.

99551238 is an abundant number, since it is smaller than the sum of its proper divisors (105566682).

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

99551238 is a wasteful number, since it uses less digits than its factorization.

99551238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its digits is 97200, while the sum is 42.

The square root of 99551238 is about 9977.5366699401. The cubic root of 99551238 is about 463.4635192489.

The spelling of 99551238 in words is "ninety-nine million, five hundred fifty-one thousand, two hundred thirty-eight".