212283145 has 4 divisors (see below), whose sum is σ = 254739780. Its totient is φ = 169826512.

The previous prime is 212283119. The next prime is 212283151. The reversal of 212283145 is 541382212.

212283145 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.

It can be written as a sum of positive squares in 2 ways, for example, as 158231241 + 54051904 = 12579^2 + 7352^2 .

It is a cyclic number.

It is not a de Polignac number, because 212283145 - 2²⁷ = 78065417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21228310 + ... + 21228319.

It is an arithmetic number, because the mean of its divisors is an integer number (63684945).

Almost surely, 2^212283145 is an apocalyptic number.

It is an amenable number.

212283145 is a deficient number, since it is larger than the sum of its proper divisors (42456635).

212283145 is an equidigital number, since it uses as much as digits as its factorization.

212283145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42456634.

The product of its digits is 3840, while the sum is 28.

The square root of 212283145 is about 14569.9397733827. The cubic root of 212283145 is about 596.5385364448.

The spelling of 212283145 in words is "two hundred twelve million, two hundred eighty-three thousand, one hundred forty-five".