212943245 has 4 divisors (see below), whose sum is σ = 255531900. Its totient is φ = 170354592.

The previous prime is 212943197. The next prime is 212943277. The reversal of 212943245 is 542349212.

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 26183689 + 186759556 = 5117^2 + 13666^2 .

It is a cyclic number.

It is not a de Polignac number, because 212943245 - 2²² = 208748941 is a prime.

It is a super-2 number, since 2×212943245² = 90689651182260050, which contains 22 as substring.

It is a congruent number.

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, 21294320 + ... + 21294329.

It is an arithmetic number, because the mean of its divisors is an integer number (63882975).

Almost surely, 2^212943245 is an apocalyptic number.

It is an amenable number.

212943245 is a deficient number, since it is larger than the sum of its proper divisors (42588655).

212943245 is an equidigital number, since it uses as much as digits as its factorization.

212943245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42588654.

The product of its digits is 17280, while the sum is 32.

The square root of 212943245 is about 14592.5749955243. The cubic root of 212943245 is about 597.1562140600.

The spelling of 212943245 in words is "two hundred twelve million, nine hundred forty-three thousand, two hundred forty-five".