99131544 has 24 divisors (see below), whose sum is σ = 268481460. Its totient is φ = 33043824.

The previous prime is 99131519. The next prime is 99131579. The reversal of 99131544 is 44513199.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 99131499 and 99131508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688342 + ... + 688485.

Almost surely, 2^99131544 is an apocalyptic number.

It is an amenable number.

99131544 is an abundant number, since it is smaller than the sum of its proper divisors (169349916).

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

99131544 is a wasteful number, since it uses less digits than its factorization.

99131544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376839 (or 1376832 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 99131544 is about 9956.4825114093. The cubic root of 99131544 is about 462.8113028612.

It can be divided in two parts, 99 and 131544, that multiplied together give a triangular number (13022856 = T₅₁₀₃).

The spelling of 99131544 in words is "ninety-nine million, one hundred thirty-one thousand, five hundred forty-four".