540221857 has 8 divisors (see below), whose sum is σ = 631754816. Its totient is φ = 452278512.

The previous prime is 540221849. The next prime is 540221893. The reversal of 540221857 is 758122045.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540221857 - 2³ = 540221849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (540221897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897078 + ... + 897679.

It is an arithmetic number, because the mean of its divisors is an integer number (78969352).

Almost surely, 2^540221857 is an apocalyptic number.

It is an amenable number.

540221857 is a deficient number, since it is larger than the sum of its proper divisors (91532959).

540221857 is a wasteful number, since it uses less digits than its factorization.

540221857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794807.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 540221857 is about 23242.6731896312. The cubic root of 540221857 is about 814.4367905518.

The spelling of 540221857 in words is "five hundred forty million, two hundred twenty-one thousand, eight hundred fifty-seven".