99531432 has 192 divisors, whose sum is σ = 362194560. Its totient is φ = 23846400.

The previous prime is 99531431. The next prime is 99531433. The reversal of 99531432 is 23413599.

It is a happy number.

99531432 is a `hidden beast` number, since 99 + 531 + 4 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (99531431) and next prime (99531433).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (99531431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71382 + ... + 72762.

It is an arithmetic number, because the mean of its divisors is an integer number (1886430).

Almost surely, 2^99531432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99531432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181097280).

99531432 is an abundant number, since it is smaller than the sum of its proper divisors (262663128).

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

99531432 is a wasteful number, since it uses less digits than its factorization.

99531432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424 (or 1417 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 99531432 is about 9976.5440910167. The cubic root of 99531432 is about 463.4327814183.

The spelling of 99531432 in words is "ninety-nine million, five hundred thirty-one thousand, four hundred thirty-two".