101555143 has 4 divisors (see below), whose sum is σ = 105970608. Its totient is φ = 97139680.

The previous prime is 101555123. The next prime is 101555159. The reversal of 101555143 is 341555101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341555101 = 73 ⋅4678837.

It is a cyclic number.

It is not a de Polignac number, because 101555143 - 2⁹ = 101554631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101555123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207698 + ... + 2207743.

It is an arithmetic number, because the mean of its divisors is an integer number (26492652).

Almost surely, 2^101555143 is an apocalyptic number.

101555143 is a deficient number, since it is larger than the sum of its proper divisors (4415465).

101555143 is an equidigital number, since it uses as much as digits as its factorization.

101555143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415464.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 101555143 is about 10077.4571693458. The cubic root of 101555143 is about 466.5526286544.

The spelling of 101555143 in words is "one hundred one million, five hundred fifty-five thousand, one hundred forty-three".