220520461 has 4 divisors (see below), whose sum is σ = 252023392. Its totient is φ = 189017532.

The previous prime is 220520423. The next prime is 220520491. The reversal of 220520461 is 164025022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220520461 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 (220520491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15751455 + ... + 15751468.

It is an arithmetic number, because the mean of its divisors is an integer number (63005848).

Almost surely, 2^220520461 is an apocalyptic number.

It is an amenable number.

220520461 is a deficient number, since it is larger than the sum of its proper divisors (31502931).

220520461 is an equidigital number, since it uses as much as digits as its factorization.

220520461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31502930.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 220520461 is about 14849.9313466427. The cubic root of 220520461 is about 604.1567479455.

Adding to 220520461 its reverse (164025022), we get a palindrome (384545483).

The spelling of 220520461 in words is "two hundred twenty million, five hundred twenty thousand, four hundred sixty-one".