540217531 has 8 divisors (see below), whose sum is σ = 617702400. Its totient is φ = 462810408.

The previous prime is 540217507. The next prime is 540217543. The reversal of 540217531 is 135712045.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540217531 - 2¹¹ = 540215483 is a prime.

It is a super-2 number, since 2×540217531² = 583669961599471922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 540217531.

It is not an unprimeable number, because it can be changed into a prime (540217331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3691 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (77212800).

Almost surely, 2^540217531 is an apocalyptic number.

540217531 is a deficient number, since it is larger than the sum of its proper divisors (77484869).

540217531 is a wasteful number, since it uses less digits than its factorization.

540217531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38873.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 540217531 is about 23242.5801278602. The cubic root of 540217531 is about 814.4346165912.

Adding to 540217531 its reverse (135712045), we get a palindrome (675929576).

The spelling of 540217531 in words is "five hundred forty million, two hundred seventeen thousand, five hundred thirty-one".