540145521 has 24 divisors (see below), whose sum is σ = 805066080. Its totient is φ = 348753600.

The previous prime is 540145513. The next prime is 540145553. The reversal of 540145521 is 125541045.

540145521 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 540145521 - 2³ = 540145513 is a prime.

It is a super-2 number, since 2×540145521² = 583514367712722882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (540145511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46026 + ... + 56556.

It is an arithmetic number, because the mean of its divisors is an integer number (33544420).

Almost surely, 2^540145521 is an apocalyptic number.

It is an amenable number.

540145521 is a deficient number, since it is larger than the sum of its proper divisors (264920559).

540145521 is a wasteful number, since it uses less digits than its factorization.

540145521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717 (or 10714 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 540145521 is about 23241.0309797134. The cubic root of 540145521 is about 814.3984274394.

Adding to 540145521 its reverse (125541045), we get a palindrome (665686566).

The spelling of 540145521 in words is "five hundred forty million, one hundred forty-five thousand, five hundred twenty-one".