100431530 has 32 divisors (see below), whose sum is σ = 191419200. Its totient is φ = 37832832.

The previous prime is 100431521. The next prime is 100431533. The reversal of 100431530 is 35134001.

It is a junction number, because it is equal to n+sod(n) for n = 100431499 and 100431508.

It is not an unprimeable number, because it can be changed into a prime (100431533) 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 15 ways as a sum of consecutive naturals, for example, 32534 + ... + 35486.

It is an arithmetic number, because the mean of its divisors is an integer number (5981850).

Almost surely, 2^100431530 is an apocalyptic number.

100431530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100431530 is a deficient number, since it is larger than the sum of its proper divisors (90987670).

100431530 is a wasteful number, since it uses less digits than its factorization.

100431530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 100431530 is about 10021.5532728215. The cubic root of 100431530 is about 464.8255868802.

Adding to 100431530 its reverse (35134001), we get a palindrome (135565531).

The spelling of 100431530 in words is "one hundred million, four hundred thirty-one thousand, five hundred thirty".