220851660 has 48 divisors (see below), whose sum is σ = 619567200. Its totient is φ = 58781184.

The previous prime is 220851643. The next prime is 220851661. The reversal of 220851660 is 66158022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (220851661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30906 + ... + 37374.

It is an arithmetic number, because the mean of its divisors is an integer number (12907650).

Almost surely, 2^220851660 is an apocalyptic number.

220851660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220851660 is an abundant number, since it is smaller than the sum of its proper divisors (398715540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220851660 is a wasteful number, since it uses less digits than its factorization.

220851660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7050 (or 7048 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 220851660 is about 14861.0786957071. The cubic root of 220851660 is about 604.4590570355.

The spelling of 220851660 in words is "two hundred twenty million, eight hundred fifty-one thousand, six hundred sixty".