2155112740 has 24 divisors (see below), whose sum is σ = 4937167872. Its totient is φ = 783677280.

The previous prime is 2155112731. The next prime is 2155112747. The reversal of 2155112740 is 472115512.

It is a super-3 number, since 3×2155112740³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2155112699 and 2155112708.

It is not an unprimeable number, because it can be changed into a prime (2155112747) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4897764 + ... + 4898203.

It is an arithmetic number, because the mean of its divisors is an integer number (205715328).

Almost surely, 2^2155112740 is an apocalyptic number.

2155112740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155112740 is an abundant number, since it is smaller than the sum of its proper divisors (2782055132).

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

2155112740 is a wasteful number, since it uses less digits than its factorization.

2155112740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795987 (or 9795985 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 2155112740 is about 46423.1918333929. The cubic root of 2155112740 is about 1291.6851442287.

The spelling of 2155112740 in words is "two billion, one hundred fifty-five million, one hundred twelve thousand, seven hundred forty".