210725220 has 24 divisors (see below), whose sum is σ = 590030784. Its totient is φ = 56193376.

The previous prime is 210725213. The next prime is 210725233. The reversal of 210725220 is 22527012.

It is a happy number.

210725220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755984 + ... + 1756103.

It is an arithmetic number, because the mean of its divisors is an integer number (24584616).

Almost surely, 2^210725220 is an apocalyptic number.

210725220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210725220 is an abundant number, since it is smaller than the sum of its proper divisors (379305564).

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

210725220 is a wasteful number, since it uses less digits than its factorization.

210725220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512099 (or 3512097 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 210725220 is about 14516.3776473334. The cubic root of 210725220 is about 595.0756394671.

The spelling of 210725220 in words is "two hundred ten million, seven hundred twenty-five thousand, two hundred twenty".