220540351 has 4 divisors (see below), whose sum is σ = 221772600. Its totient is φ = 219308104.

The previous prime is 220540339. The next prime is 220540381. The reversal of 220540351 is 153045022.

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 220540351 - 2¹⁵ = 220507583 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 (220540381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615856 + ... + 616213.

It is an arithmetic number, because the mean of its divisors is an integer number (55443150).

Almost surely, 2^220540351 is an apocalyptic number.

220540351 is a deficient number, since it is larger than the sum of its proper divisors (1232249).

220540351 is a wasteful number, since it uses less digits than its factorization.

220540351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232248.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220540351 is about 14850.6010316081. The cubic root of 220540351 is about 604.1749115154.

Adding to 220540351 its reverse (153045022), we get a palindrome (373585373).

The spelling of 220540351 in words is "two hundred twenty million, five hundred forty thousand, three hundred fifty-one".