2155185488 has 10 divisors (see below), whose sum is σ = 4175671914. Its totient is φ = 1077592736.

The previous prime is 2155185469. The next prime is 2155185551. The reversal of 2155185488 is 8845815512.

It can be written as a sum of positive squares in only one way, i.e., 1972070464 + 183115024 = 44408^2 + 13532^2 .

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, 67349531 + ... + 67349562.

Almost surely, 2^2155185488 is an apocalyptic number.

It is an amenable number.

2155185488 is a deficient number, since it is larger than the sum of its proper divisors (2020486426).

2155185488 is a wasteful number, since it uses less digits than its factorization.

2155185488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134699101 (or 134699095 counting only the distinct ones).

The product of its digits is 512000, while the sum is 47.

The square root of 2155185488 is about 46423.9753575671. The cubic root of 2155185488 is about 1291.6996781093.

The spelling of 2155185488 in words is "two billion, one hundred fifty-five million, one hundred eighty-five thousand, four hundred eighty-eight".