540221967 has 20 divisors (see below), whose sum is σ = 810169536. Its totient is φ = 358732800.

The previous prime is 540221959. The next prime is 540221993. The reversal of 540221967 is 769122045.

540221967 is a `hidden beast` number, since 540 + 2 + 21 + 96 + 7 = 666.

It is not a de Polignac number, because 540221967 - 2³ = 540221959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540221267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7842 + ... + 33792.

Almost surely, 2^540221967 is an apocalyptic number.

540221967 is a deficient number, since it is larger than the sum of its proper divisors (269947569).

540221967 is a wasteful number, since it uses less digits than its factorization.

540221967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26220 (or 26211 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 540221967 is about 23242.6755559682. The cubic root of 540221967 is about 814.4368458303.

The spelling of 540221967 in words is "five hundred forty million, two hundred twenty-one thousand, nine hundred sixty-seven".