2154223500 has 384 divisors, whose sum is σ = 7520228352. Its totient is φ = 476256000.

The previous prime is 2154223499. The next prime is 2154223541. The reversal of 2154223500 is 53224512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25954459 + ... + 25954541.

It is an arithmetic number, because the mean of its divisors is an integer number (19583928).

Almost surely, 2^2154223500 is an apocalyptic number.

2154223500 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 2154223500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3760114176).

2154223500 is an abundant number, since it is smaller than the sum of its proper divisors (5366004852).

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

2154223500 is a wasteful number, since it uses less digits than its factorization.

2154223500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2154223500 is about 46413.6133047191. The cubic root of 2154223500 is about 1291.5074619365.

The spelling of 2154223500 in words is "two billion, one hundred fifty-four million, two hundred twenty-three thousand, five hundred".