100155643 has 8 divisors (see below), whose sum is σ = 117125888. Its totient is φ = 83850984.

The previous prime is 100155623. The next prime is 100155659. The reversal of 100155643 is 346551001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100155643 - 2⁵ = 100155611 is a prime.

It is a super-3 number, since 3×100155643³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100155623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166071 + ... + 166672.

It is an arithmetic number, because the mean of its divisors is an integer number (14640736).

Almost surely, 2^100155643 is an apocalyptic number.

100155643 is a deficient number, since it is larger than the sum of its proper divisors (16970245).

100155643 is an equidigital number, since it uses as much as digits as its factorization.

100155643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332793.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 100155643 is about 10007.7791242613. The cubic root of 100155643 is about 464.3995688047.

It can be divided in two parts, 1001 and 55643, that added together give a square (56644 = 238²).

The spelling of 100155643 in words is "one hundred million, one hundred fifty-five thousand, six hundred forty-three".