2155432316 has 24 divisors (see below), whose sum is σ = 3864086016. Its totient is φ = 1051686720.

The previous prime is 2155432297. The next prime is 2155432393. The reversal of 2155432316 is 6132345512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3791 + ... + 65766.

It is an arithmetic number, because the mean of its divisors is an integer number (161003584).

Almost surely, 2^2155432316 is an apocalyptic number.

It is an amenable number.

2155432316 is a deficient number, since it is larger than the sum of its proper divisors (1708653700).

2155432316 is a wasteful number, since it uses less digits than its factorization.

2155432316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69749 (or 69747 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 2155432316 is about 46426.6336923107. The cubic root of 2155432316 is about 1291.7489879373.

Adding to 2155432316 its reverse (6132345512), we get a palindrome (8287777828).

The spelling of 2155432316 in words is "two billion, one hundred fifty-five million, four hundred thirty-two thousand, three hundred sixteen".