100857581 has 16 divisors (see below), whose sum is σ = 113533056. Its totient is φ = 88800000.

The previous prime is 100857577. The next prime is 100857587. The reversal of 100857581 is 185758001.

It is a cyclic number.

It is not a de Polignac number, because 100857581 - 2² = 100857577 is a prime.

It is a super-2 number, since 2×100857581² = 20344503290343122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100857587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67361 + ... + 68841.

It is an arithmetic number, because the mean of its divisors is an integer number (7095816).

Almost surely, 2^100857581 is an apocalyptic number.

100857581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100857581 is a deficient number, since it is larger than the sum of its proper divisors (12675475).

100857581 is a wasteful number, since it uses less digits than its factorization.

100857581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 100857581 is about 10042.7875114432. The cubic root of 100857581 is about 465.4819545338.

The spelling of 100857581 in words is "one hundred million, eight hundred fifty-seven thousand, five hundred eighty-one".