101019855 has 32 divisors (see below), whose sum is σ = 170035200. Its totient is φ = 51143040.

The previous prime is 101019851. The next prime is 101019869. The reversal of 101019855 is 558910101.

101019855 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 101019855 - 2² = 101019851 is a prime.

It is a super-2 number, since 2×101019855² = 20410022208442050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101019851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22596 + ... + 26694.

It is an arithmetic number, because the mean of its divisors is an integer number (5313600).

Almost surely, 2^101019855 is an apocalyptic number.

101019855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101019855 is a deficient number, since it is larger than the sum of its proper divisors (69015345).

101019855 is a wasteful number, since it uses less digits than its factorization.

101019855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 101019855 is about 10050.8633957486. The cubic root of 101019855 is about 465.7314652574.

Adding to 101019855 its reverse (558910101), we get a palindrome (659929956).

The spelling of 101019855 in words is "one hundred one million, nineteen thousand, eight hundred fifty-five".