101808142 has 4 divisors (see below), whose sum is σ = 152712216. Its totient is φ = 50904070.

The previous prime is 101808131. The next prime is 101808151. The reversal of 101808142 is 241808101.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25452034 + ... + 25452037.

It is an arithmetic number, because the mean of its divisors is an integer number (38178054).

Almost surely, 2^101808142 is an apocalyptic number.

101808142 is a deficient number, since it is larger than the sum of its proper divisors (50904074).

101808142 is an equidigital number, since it uses as much as digits as its factorization.

101808142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50904073.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 101808142 is about 10090.0020812684. The cubic root of 101808142 is about 466.9397400646.

The spelling of 101808142 in words is "one hundred one million, eight hundred eight thousand, one hundred forty-two".