100531236 has 24 divisors (see below), whose sum is σ = 252617344. Its totient is φ = 30932640.

The previous prime is 100531231. The next prime is 100531247. The reversal of 100531236 is 632135001.

It is not an unprimeable number, because it can be changed into a prime (100531231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322060 + ... + 322371.

Almost surely, 2^100531236 is an apocalyptic number.

It is an amenable number.

100531236 is an abundant number, since it is smaller than the sum of its proper divisors (152086108).

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

100531236 is a wasteful number, since it uses less digits than its factorization.

100531236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644451 (or 644449 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 100531236 is about 10026.5266169297. The cubic root of 100531236 is about 464.9793585473.

Adding to 100531236 its reverse (632135001), we get a palindrome (732666237).

The spelling of 100531236 in words is "one hundred million, five hundred thirty-one thousand, two hundred thirty-six".