540304421 has 4 divisors (see below), whose sum is σ = 572087052. Its totient is φ = 508521792.

The previous prime is 540304411. The next prime is 540304441. The reversal of 540304421 is 124403045.

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 352312900 + 187991521 = 18770^2 + 13711^2 .

It is a cyclic number.

It is not a de Polignac number, because 540304421 - 2²² = 536110117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540304411) 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, 15891290 + ... + 15891323.

It is an arithmetic number, because the mean of its divisors is an integer number (143021763).

Almost surely, 2^540304421 is an apocalyptic number.

It is an amenable number.

540304421 is a deficient number, since it is larger than the sum of its proper divisors (31782631).

540304421 is a wasteful number, since it uses less digits than its factorization.

540304421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31782630.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 540304421 is about 23244.4492513804. The cubic root of 540304421 is about 814.4782795147.

Adding to 540304421 its reverse (124403045), we get a palindrome (664707466).

The spelling of 540304421 in words is "five hundred forty million, three hundred four thousand, four hundred twenty-one".