540191531 has 8 divisors (see below), whose sum is σ = 595135728. Its totient is φ = 486220000.

The previous prime is 540191513. The next prime is 540191537. The reversal of 540191531 is 135191045.

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 540191531 - 2⁶ = 540191467 is a prime.

It is a super-2 number, since 2×540191531² = 583613780328247922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 540191494 and 540191503.

It is not an unprimeable number, because it can be changed into a prime (540191537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242000 + ... + 244221.

It is an arithmetic number, because the mean of its divisors is an integer number (74391966).

Almost surely, 2^540191531 is an apocalyptic number.

540191531 is a deficient number, since it is larger than the sum of its proper divisors (54944197).

540191531 is a wasteful number, since it uses less digits than its factorization.

540191531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486333.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 540191531 is about 23242.0208028476. The cubic root of 540191531 is about 814.4215504722.

The spelling of 540191531 in words is "five hundred forty million, one hundred ninety-one thousand, five hundred thirty-one".