540020651 has 4 divisors (see below), whose sum is σ = 557440704. Its totient is φ = 522600600.

The previous prime is 540020599. The next prime is 540020653. The reversal of 540020651 is 156020045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156020045 = 5 ⋅31204009.

It is a cyclic number.

It is not a de Polignac number, because 540020651 - 2¹⁸ = 539758507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540020653) 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, 8709980 + ... + 8710041.

It is an arithmetic number, because the mean of its divisors is an integer number (139360176).

Almost surely, 2^540020651 is an apocalyptic number.

540020651 is a deficient number, since it is larger than the sum of its proper divisors (17420053).

540020651 is a wasteful number, since it uses less digits than its factorization.

540020651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17420052.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 540020651 is about 23238.3444117691. The cubic root of 540020651 is about 814.3356654829.

Adding to 540020651 its reverse (156020045), we get a palindrome (696040696).

The spelling of 540020651 in words is "five hundred forty million, twenty thousand, six hundred fifty-one".