56531219 has 2 divisors, whose sum is σ = 56531220. Its totient is φ = 56531218.

The previous prime is 56531207. The next prime is 56531249. The reversal of 56531219 is 91213565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56531219 - 2¹⁶ = 56465683 is a prime.

It is a super-3 number, since 3×56531219³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56531249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28265609 + 28265610.

It is an arithmetic number, because the mean of its divisors is an integer number (28265610).

Almost surely, 2^56531219 is an apocalyptic number.

56531219 is a deficient number, since it is larger than the sum of its proper divisors (1).

56531219 is an equidigital number, since it uses as much as digits as its factorization.

56531219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 56531219 is about 7518.7245593917. The cubic root of 56531219 is about 383.7921758651.

The spelling of 56531219 in words is "fifty-six million, five hundred thirty-one thousand, two hundred nineteen".