2155022544 has 40 divisors (see below), whose sum is σ = 5894622720. Its totient is φ = 676085248.

The previous prime is 2155022543. The next prime is 2155022581. The reversal of 2155022544 is 4452205512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155022543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1319664 + ... + 1321295.

It is an arithmetic number, because the mean of its divisors is an integer number (147365568).

Almost surely, 2^2155022544 is an apocalyptic number.

2155022544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2155022544 is an abundant number, since it is smaller than the sum of its proper divisors (3739600176).

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

2155022544 is a wasteful number, since it uses less digits than its factorization.

2155022544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640987 (or 2640981 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2155022544 is about 46422.2203691293. The cubic root of 2155022544 is about 1291.6671240641.

The spelling of 2155022544 in words is "two billion, one hundred fifty-five million, twenty-two thousand, five hundred forty-four".