212285745 has 64 divisors (see below), whose sum is σ = 450109440. Its totient is φ = 92816064.

The previous prime is 212285701. The next prime is 212285767. The reversal of 212285745 is 547582212.

It is a happy number.

212285745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212285745 - 2¹⁷ = 212154673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16852 + ... + 26618.

It is an arithmetic number, because the mean of its divisors is an integer number (7032960).

Almost surely, 2^212285745 is an apocalyptic number.

It is an amenable number.

212285745 is an abundant number, since it is smaller than the sum of its proper divisors (237823695).

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

212285745 is a wasteful number, since it uses less digits than its factorization.

212285745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9811 (or 9805 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 212285745 is about 14570.0289979121. The cubic root of 212285745 is about 596.5409718617.

The spelling of 212285745 in words is "two hundred twelve million, two hundred eighty-five thousand, seven hundred forty-five".