2154223520 has 24 divisors (see below), whose sum is σ = 5089353444. Its totient is φ = 861689344.

The previous prime is 2154223499. The next prime is 2154223541. The reversal of 2154223520 is 253224512.

It is an interprime number because it is at equal distance from previous prime (2154223499) and next prime (2154223541).

It can be written as a sum of positive squares in 2 ways, for example, as 2122997776 + 31225744 = 46076^2 + 5588^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2154223520.

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, 6731789 + ... + 6732108.

Almost surely, 2^2154223520 is an apocalyptic number.

2154223520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154223520 is an abundant number, since it is smaller than the sum of its proper divisors (2935129924).

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

2154223520 is a wasteful number, since it uses less digits than its factorization.

2154223520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463912 (or 13463904 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2154223520 is about 46413.6135201732. The cubic root of 2154223520 is about 1291.5074659334.

The spelling of 2154223520 in words is "two billion, one hundred fifty-four million, two hundred twenty-three thousand, five hundred twenty".