540031391 has 8 divisors (see below), whose sum is σ = 555471840. Its totient is φ = 524635488.

The previous prime is 540031361. The next prime is 540031397. The reversal of 540031391 is 193130045.

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 540031391 - 2¹⁰ = 540030367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540031391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540031397) 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, 14270 + ... + 35828.

It is an arithmetic number, because the mean of its divisors is an integer number (69433980).

Almost surely, 2^540031391 is an apocalyptic number.

540031391 is a deficient number, since it is larger than the sum of its proper divisors (15440449).

540031391 is a wasteful number, since it uses less digits than its factorization.

540031391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22273.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 540031391 is about 23238.5754942079. The cubic root of 540031391 is about 814.3410639845.

The spelling of 540031391 in words is "five hundred forty million, thirty-one thousand, three hundred ninety-one".