540231121 has 4 divisors (see below), whose sum is σ = 545800612. Its totient is φ = 534661632.

The previous prime is 540231089. The next prime is 540231137. The reversal of 540231121 is 121132045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197796096 + 342435025 = 14064^2 + 18505^2 .

It is a cyclic number.

It is not a de Polignac number, because 540231121 - 2⁵ = 540231089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540231421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2784600 + ... + 2784793.

It is an arithmetic number, because the mean of its divisors is an integer number (136450153).

Almost surely, 2^540231121 is an apocalyptic number.

It is an amenable number.

540231121 is a deficient number, since it is larger than the sum of its proper divisors (5569491).

540231121 is an equidigital number, since it uses as much as digits as its factorization.

540231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569490.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 540231121 is about 23242.8724773854. The cubic root of 540231121 is about 814.4414459843.

Adding to 540231121 its reverse (121132045), we get a palindrome (661363166).

The spelling of 540231121 in words is "five hundred forty million, two hundred thirty-one thousand, one hundred twenty-one".