220556851 has 4 divisors (see below), whose sum is σ = 220647472. Its totient is φ = 220466232.

The previous prime is 220556849. The next prime is 220556911. The reversal of 220556851 is 158655022.

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 220556851 - 2¹ = 220556849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220556801) 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, 41556 + ... + 46561.

It is an arithmetic number, because the mean of its divisors is an integer number (55161868).

Almost surely, 2^220556851 is an apocalyptic number.

220556851 is a deficient number, since it is larger than the sum of its proper divisors (90621).

220556851 is an equidigital number, since it uses as much as digits as its factorization.

220556851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90620.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 220556851 is about 14851.1565542890. The cubic root of 220556851 is about 604.1899785049.

The spelling of 220556851 in words is "two hundred twenty million, five hundred fifty-six thousand, eight hundred fifty-one".