2154124240 has 80 divisors (see below), whose sum is σ = 5280912000. Its totient is φ = 814910976.

The previous prime is 2154124237. The next prime is 2154124253. The reversal of 2154124240 is 424214512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 1539061 + ... + 1540459.

It is an arithmetic number, because the mean of its divisors is an integer number (66011400).

Almost surely, 2^2154124240 is an apocalyptic number.

2154124240 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 2154124240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2640456000).

2154124240 is an abundant number, since it is smaller than the sum of its proper divisors (3126787760).

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

2154124240 is a wasteful number, since it uses less digits than its factorization.

2154124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2154124240 is about 46412.5439940540. The cubic root of 2154124240 is about 1291.4876254000.

Adding to 2154124240 its reverse (424214512), we get a palindrome (2578338752).

The spelling of 2154124240 in words is "two billion, one hundred fifty-four million, one hundred twenty-four thousand, two hundred forty".