206351220 has 48 divisors (see below), whose sum is σ = 593405568. Its totient is φ = 53539200.

The previous prime is 206351209. The next prime is 206351231. The reversal of 206351220 is 22153602.

206351220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (206351209) and next prime (206351231).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44256 + ... + 48695.

It is an arithmetic number, because the mean of its divisors is an integer number (12362616).

Almost surely, 2^206351220 is an apocalyptic number.

206351220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206351220 is an abundant number, since it is smaller than the sum of its proper divisors (387054348).

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

206351220 is a wasteful number, since it uses less digits than its factorization.

206351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93000 (or 92998 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 206351220 is about 14364.9302121521. The cubic root of 206351220 is about 590.9295125236.

The spelling of 206351220 in words is "two hundred six million, three hundred fifty-one thousand, two hundred twenty".