2154544520 has 64 divisors (see below), whose sum is σ = 5118120000. Its totient is φ = 814019328.

The previous prime is 2154544519. The next prime is 2154544537. The reversal of 2154544520 is 254454512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261179 + ... + 269301.

It is an arithmetic number, because the mean of its divisors is an integer number (79970625).

Almost surely, 2^2154544520 is an apocalyptic number.

2154544520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154544520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2559060000).

2154544520 is an abundant number, since it is smaller than the sum of its proper divisors (2963575480).

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

2154544520 is a wasteful number, since it uses less digits than its factorization.

2154544520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502 (or 8498 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2154544520 is about 46417.0714285165. The cubic root of 2154544520 is about 1291.5716117540.

The spelling of 2154544520 in words is "two billion, one hundred fifty-four million, five hundred forty-four thousand, five hundred twenty".