2155031012 has 12 divisors (see below), whose sum is σ = 3863287596. Its totient is φ = 1051234560.

The previous prime is 2155030949. The next prime is 2155031033. The reversal of 2155031012 is 2101305512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 195552256 + 1959478756 = 13984^2 + 44266^2 .

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, 6570053 + ... + 6570380.

It is an arithmetic number, because the mean of its divisors is an integer number (321940633).

Almost surely, 2^2155031012 is an apocalyptic number.

It is an amenable number.

2155031012 is a deficient number, since it is larger than the sum of its proper divisors (1708256584).

2155031012 is a wasteful number, since it uses less digits than its factorization.

2155031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140478 (or 13140476 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2155031012 is about 46422.3115753621. The cubic root of 2155031012 is about 1291.6688158984.

Adding to 2155031012 its reverse (2101305512), we get a palindrome (4256336524).

The spelling of 2155031012 in words is "two billion, one hundred fifty-five million, thirty-one thousand, twelve".