2155264000 has 96 divisors (see below), whose sum is σ = 5378864400. Its totient is φ = 862003200.

The previous prime is 2155263983. The next prime is 2155264019. The reversal of 2155264000 is 4625512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251791 + ... + 260209.

Almost surely, 2^2155264000 is an apocalyptic number.

2155264000 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 2155264000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2689432200).

2155264000 is an abundant number, since it is smaller than the sum of its proper divisors (3223600400).

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

2155264000 is an frugal number, since it uses more digits than its factorization.

2155264000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8456 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2155264000 is about 46424.8209474199. The cubic root of 2155264000 is about 1291.7153631774.

Adding to 2155264000 its reverse (4625512), we get a palindrome (2159889512).

The spelling of 2155264000 in words is "two billion, one hundred fifty-five million, two hundred sixty-four thousand".