2154531240 has 96 divisors (see below), whose sum is σ = 7007967720. Its totient is φ = 574070784.

The previous prime is 2154531167. The next prime is 2154531317. The reversal of 2154531240 is 421354512.

It can be written as a sum of positive squares in 4 ways, for example, as 1789797636 + 364733604 = 42306^2 + 19098^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 816964 + ... + 819596.

Almost surely, 2^2154531240 is an apocalyptic number.

2154531240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154531240 is an abundant number, since it is smaller than the sum of its proper divisors (4853436480).

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

2154531240 is a wasteful number, since it uses less digits than its factorization.

2154531240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923 (or 4916 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2154531240 is about 46416.9283774788. The cubic root of 2154531240 is about 1291.5689581218.

Adding to 2154531240 its reverse (421354512), we get a palindrome (2575885752).

The spelling of 2154531240 in words is "two billion, one hundred fifty-four million, five hundred thirty-one thousand, two hundred forty".