2155432142 has 8 divisors (see below), whose sum is σ = 3423333456. Its totient is φ = 1014320992.

The previous prime is 2155432141. The next prime is 2155432157. The reversal of 2155432142 is 2412345512.

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 (2155432141) 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, 31697498 + ... + 31697565.

It is an arithmetic number, because the mean of its divisors is an integer number (427916682).

Almost surely, 2^2155432142 is an apocalyptic number.

2155432142 is a deficient number, since it is larger than the sum of its proper divisors (1267901314).

2155432142 is a wasteful number, since it uses less digits than its factorization.

2155432142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63395082.

The product of its digits is 9600, while the sum is 29.

The square root of 2155432142 is about 46426.6318183863. The cubic root of 2155432142 is about 1291.7489531779.

Adding to 2155432142 its reverse (2412345512), we get a palindrome (4567777654).

The spelling of 2155432142 in words is "two billion, one hundred fifty-five million, four hundred thirty-two thousand, one hundred forty-two".