540021500 has 24 divisors (see below), whose sum is σ = 1179408048. Its totient is φ = 216008400.

The previous prime is 540021497. The next prime is 540021509. The reversal of 540021500 is 5120045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540021509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539522 + ... + 540521.

It is an arithmetic number, because the mean of its divisors is an integer number (49142002).

Almost surely, 2^540021500 is an apocalyptic number.

540021500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

540021500 is an abundant number, since it is smaller than the sum of its proper divisors (639386548).

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

540021500 is a wasteful number, since it uses less digits than its factorization.

540021500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080062 (or 1080050 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 540021500 is about 23238.3626789841. The cubic root of 540021500 is about 814.3360922385.

Adding to 540021500 its reverse (5120045), we get a palindrome (545141545).

The spelling of 540021500 in words is "five hundred forty million, twenty-one thousand, five hundred".