212249617 has 4 divisors (see below), whose sum is σ = 215157220. Its totient is φ = 209342016.

The previous prime is 212249593. The next prime is 212249623. The reversal of 212249617 is 716942212.

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 104837121 + 107412496 = 10239^2 + 10364^2 .

It is a cyclic number.

It is not a de Polignac number, because 212249617 - 2⁷ = 212249489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212249647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453692 + ... + 1453837.

It is an arithmetic number, because the mean of its divisors is an integer number (53789305).

Almost surely, 2^212249617 is an apocalyptic number.

It is an amenable number.

212249617 is a deficient number, since it is larger than the sum of its proper divisors (2907603).

212249617 is an equidigital number, since it uses as much as digits as its factorization.

212249617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907602.

The product of its digits is 12096, while the sum is 34.

The square root of 212249617 is about 14568.7891398016. The cubic root of 212249617 is about 596.5071290257.

The spelling of 212249617 in words is "two hundred twelve million, two hundred forty-nine thousand, six hundred seventeen".