100581912 has 40 divisors (see below), whose sum is σ = 281724300. Its totient is φ = 33527088.

The previous prime is 100581907. The next prime is 100581913. The reversal of 100581912 is 219185001.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100581913) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76962 + ... + 78257.

Almost surely, 2^100581912 is an apocalyptic number.

100581912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100581912 is an abundant number, since it is smaller than the sum of its proper divisors (181142388).

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

100581912 is a wasteful number, since it uses less digits than its factorization.

100581912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155237 (or 155224 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 100581912 is about 10029.0533950119. The cubic root of 100581912 is about 465.0574746856.

The spelling of 100581912 in words is "one hundred million, five hundred eighty-one thousand, nine hundred twelve".