540221685 has 32 divisors (see below), whose sum is σ = 895200768. Its totient is φ = 277999680.

The previous prime is 540221653. The next prime is 540221711. The reversal of 540221685 is 586122045.

It is not a de Polignac number, because 540221685 - 2⁵ = 540221653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48490 + ... + 58580.

It is an arithmetic number, because the mean of its divisors is an integer number (27975024).

Almost surely, 2^540221685 is an apocalyptic number.

It is an amenable number.

540221685 is a deficient number, since it is larger than the sum of its proper divisors (354979083).

540221685 is a wasteful number, since it uses less digits than its factorization.

540221685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 540221685 is about 23242.6694895401. The cubic root of 540221685 is about 814.4367041162.

The spelling of 540221685 in words is "five hundred forty million, two hundred twenty-one thousand, six hundred eighty-five".