2155523142 has 8 divisors (see below), whose sum is σ = 4311046296. Its totient is φ = 718507712.

The previous prime is 2155523119. The next prime is 2155523173. The reversal of 2155523142 is 2413255512.

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

2155523142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 179626923 + ... + 179626934.

It is an arithmetic number, because the mean of its divisors is an integer number (538880787).

Almost surely, 2^2155523142 is an apocalyptic number.

2155523142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155523142 is a wasteful number, since it uses less digits than its factorization.

2155523142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359253862.

The product of its digits is 12000, while the sum is 30.

The square root of 2155523142 is about 46427.6118489849. The cubic root of 2155523142 is about 1291.7671316673.

Adding to 2155523142 its reverse (2413255512), we get a palindrome (4568778654).

The spelling of 2155523142 in words is "two billion, one hundred fifty-five million, five hundred twenty-three thousand, one hundred forty-two".