2155104440 has 16 divisors (see below), whose sum is σ = 4848985080. Its totient is φ = 862041760.

The previous prime is 2155104409. The next prime is 2155104451. The reversal of 2155104440 is 444015512.

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 in 3 ways as a sum of consecutive naturals, for example, 26938766 + ... + 26938845.

Almost surely, 2^2155104440 is an apocalyptic number.

2155104440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155104440 is an abundant number, since it is smaller than the sum of its proper divisors (2693880640).

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

2155104440 is a wasteful number, since it uses less digits than its factorization.

2155104440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53877622 (or 53877618 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 2155104440 is about 46423.1024383334. The cubic root of 2155104440 is about 1291.6834860014.

Adding to 2155104440 its reverse (444015512), we get a palindrome (2599119952).

The spelling of 2155104440 in words is "two billion, one hundred fifty-five million, one hundred four thousand, four hundred forty".