100031540 has 72 divisors (see below), whose sum is σ = 246984192. Its totient is φ = 33929280.

The previous prime is 100031537. The next prime is 100031543. The reversal of 100031540 is 45130001.

It is an interprime number because it is at equal distance from previous prime (100031537) and next prime (100031543).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100445 + ... + 101435.

It is an arithmetic number, because the mean of its divisors is an integer number (3430336).

Almost surely, 2^100031540 is an apocalyptic number.

100031540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100031540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123492096).

100031540 is an abundant number, since it is smaller than the sum of its proper divisors (146952652).

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

100031540 is a wasteful number, since it uses less digits than its factorization.

100031540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 100031540 is about 10001.5768756732. The cubic root of 100031540 is about 464.2076768024.

Adding to 100031540 its reverse (45130001), we get a palindrome (145161541).

The spelling of 100031540 in words is "one hundred million, thirty-one thousand, five hundred forty".