540810621 has 32 divisors (see below), whose sum is σ = 875024640. Its totient is φ = 328104000.

The previous prime is 540810619. The next prime is 540810637. The reversal of 540810621 is 126018045.

540810621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 540810621 - 2¹ = 540810619 is a prime.

It is a super-2 number, since 2×540810621² = 584952255572811282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540810671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14071 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (27344520).

Almost surely, 2^540810621 is an apocalyptic number.

It is an amenable number.

540810621 is a deficient number, since it is larger than the sum of its proper divisors (334214019).

540810621 is a wasteful number, since it uses less digits than its factorization.

540810621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21794 (or 21788 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 540810621 is about 23255.3353233188. The cubic root of 540810621 is about 814.7325560553.

Adding to 540810621 its reverse (126018045), we get a palindrome (666828666).

The spelling of 540810621 in words is "five hundred forty million, eight hundred ten thousand, six hundred twenty-one".