2154245400 has 144 divisors (see below), whose sum is σ = 7257627000. Its totient is φ = 572643840.

The previous prime is 2154245363. The next prime is 2154245449. The reversal of 2154245400 is 45424512.

2154245400 is a `hidden beast` number, since 2 + 15 + 4 + 245 + 400 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 622876 + ... + 626324.

Almost surely, 2^2154245400 is an apocalyptic number.

2154245400 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 2154245400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3628813500).

2154245400 is an abundant number, since it is smaller than the sum of its proper divisors (5103381600).

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

2154245400 is a wasteful number, since it uses less digits than its factorization.

2154245400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3806 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2154245400 is about 46413.8492262816. The cubic root of 2154245400 is about 1291.5118384428.

Adding to 2154245400 its reverse (45424512), we get a palindrome (2199669912).

The spelling of 2154245400 in words is "two billion, one hundred fifty-four million, two hundred forty-five thousand, four hundred".