2155140142 has 8 divisors (see below), whose sum is σ = 3232974600. Its totient is φ = 1077481944.

The previous prime is 2155140137. The next prime is 2155140149. The reversal of 2155140142 is 2410415512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155140149) 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 3 ways as a sum of consecutive naturals, for example, 7392 + ... + 66067.

It is an arithmetic number, because the mean of its divisors is an integer number (404121825).

Almost surely, 2^2155140142 is an apocalyptic number.

2155140142 is a deficient number, since it is larger than the sum of its proper divisors (1077834458).

2155140142 is a wasteful number, since it uses less digits than its factorization.

2155140142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88130.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2155140142 is about 46423.4869651128. The cubic root of 2155140142 is about 1291.6906187460.

Adding to 2155140142 its reverse (2410415512), we get a palindrome (4565555654).

The spelling of 2155140142 in words is "two billion, one hundred fifty-five million, one hundred forty thousand, one hundred forty-two".