220885651 has 4 divisors (see below), whose sum is σ = 252440752. Its totient is φ = 189330552.

The previous prime is 220885627. The next prime is 220885661. The reversal of 220885651 is 156588022.

220885651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156588022 = 2 ⋅78294011.

It is a cyclic number.

It is not a de Polignac number, because 220885651 - 2¹⁵ = 220852883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220885651.

It is not an unprimeable number, because it can be changed into a prime (220885661) 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, 15777540 + ... + 15777553.

It is an arithmetic number, because the mean of its divisors is an integer number (63110188).

Almost surely, 2^220885651 is an apocalyptic number.

220885651 is a deficient number, since it is larger than the sum of its proper divisors (31555101).

220885651 is an equidigital number, since it uses as much as digits as its factorization.

220885651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31555100.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 220885651 is about 14862.2222766314. Note that the first 4 decimals coincide. The cubic root of 220885651 is about 604.4900659547.

The spelling of 220885651 in words is "two hundred twenty million, eight hundred eighty-five thousand, six hundred fifty-one".