540406231 has 4 divisors (see below), whose sum is σ = 540472752. Its totient is φ = 540339712.

The previous prime is 540406219. The next prime is 540406253. The reversal of 540406231 is 132604045.

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

It is a cyclic number.

It is not a de Polignac number, because 540406231 - 2¹³ = 540398039 is a prime.

It is a super-2 number, since 2×540406231² = 584077789007250722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540406196 and 540406205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540406211) 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, 19051 + ... + 37996.

It is an arithmetic number, because the mean of its divisors is an integer number (135118188).

Almost surely, 2^540406231 is an apocalyptic number.

540406231 is a deficient number, since it is larger than the sum of its proper divisors (66521).

540406231 is an equidigital number, since it uses as much as digits as its factorization.

540406231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66520.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 540406231 is about 23246.6391334317. The cubic root of 540406231 is about 814.5294339026.

The spelling of 540406231 in words is "five hundred forty million, four hundred six thousand, two hundred thirty-one".